diff --git a/Android.mk b/Android.mk
deleted file mode 100644
index 5053e7d..0000000
--- a/Android.mk
+++ /dev/null
@@ -1 +0,0 @@
-include $(call all-subdir-makefiles)
diff --git a/core/Makefile b/core/Makefile
index 56b45df..c63e213 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1621,12 +1621,13 @@
 $(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_IMAGE_GENERATOR_JAR := $(image_generator_jar)
 $(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_ZOPFLIPNG := $(zopflipng)
 $(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_RECOVERY_IMAGE_WIDTH := $(recovery_image_width)
-$(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_RECOVERY_TEXT_LIST := \
+$(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_RECOVERY_BACKGROUND_TEXT_LIST := \
   recovery_installing \
   recovery_installing_security \
   recovery_erasing \
   recovery_error \
-  recovery_no_command \
+  recovery_no_command
+$(RECOVERY_INSTALLING_TEXT_FILE): PRIVATE_RECOVERY_WIPE_DATA_TEXT_LIST := \
   recovery_cancel_wipe_data \
   recovery_factory_data_reset \
   recovery_try_again \
@@ -1638,17 +1639,17 @@
 	@rm -rf $(PRIVATE_RECOVERY_FONT_FILES_DIR)
 	@mkdir -p $(PRIVATE_RECOVERY_FONT_FILES_DIR)
 	$(foreach filename,$(PRIVATE_SOURCE_FONTS), cp $(filename) $(PRIVATE_RECOVERY_FONT_FILES_DIR) &&) true
-
 	@rm -rf $(dir $@)
 	@mkdir -p $(dir $@)
-	$(foreach text_name,$(PRIVATE_RECOVERY_TEXT_LIST), \
+	$(foreach text_name,$(PRIVATE_RECOVERY_BACKGROUND_TEXT_LIST) $(PRIVATE_RECOVERY_WIPE_DATA_TEXT_LIST), \
 	  $(eval output_file := $(dir $@)/$(patsubst recovery_%,%_text.png,$(text_name))) \
+	  $(eval center_alignment := $(if $(filter $(text_name),$(PRIVATE_RECOVERY_BACKGROUND_TEXT_LIST)), --center_alignment)) \
 	  java -jar $(PRIVATE_IMAGE_GENERATOR_JAR) \
 	    --image_width $(PRIVATE_RECOVERY_IMAGE_WIDTH) \
 	    --text_name $(text_name) \
 	    --font_dir $(PRIVATE_RECOVERY_FONT_FILES_DIR) \
 	    --resource_dir $(PRIVATE_RESOURCE_DIR) \
-	    --output_file $(output_file) && \
+	    --output_file $(output_file) $(center_alignment) && \
 	  $(PRIVATE_ZOPFLIPNG) -y --iterations=1 --filters=0 $(output_file) $(output_file) > /dev/null &&) true
 else
 RECOVERY_INSTALLING_TEXT_FILE :=
@@ -3284,7 +3285,9 @@
   $(HOST_LIBRARY_PATH)/libpcre2$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/libbrotli$(HOST_SHLIB_SUFFIX) \
   $(HOST_LIBRARY_PATH)/liblp$(HOST_SHLIB_SUFFIX) \
-  $(HOST_LIBRARY_PATH)/libext4_utils$(HOST_SHLIB_SUFFIX)
+  $(HOST_LIBRARY_PATH)/libext4_utils$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libfec$(HOST_SHLIB_SUFFIX) \
+  $(HOST_LIBRARY_PATH)/libsquashfs_utils$(HOST_SHLIB_SUFFIX)
 
 
 .PHONY: otatools
@@ -3425,6 +3428,8 @@
   echo "lpmake=$(notdir $(LPMAKE))" >> $(1)
   $(if $(filter true,$(PRODUCT_BUILD_SUPER_PARTITION)), $(if $(BOARD_SUPER_PARTITION_SIZE), \
     echo "build_super_partition=true" >> $(1)))
+  $(if $(filter true,$(BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE)), \
+    echo "build_retrofit_dynamic_partitions_ota_package=true" >> $(1))
   echo "super_metadata_device=$(BOARD_SUPER_PARTITION_METADATA_DEVICE)" >> $(1)
   $(if $(BOARD_SUPER_PARTITION_BLOCK_DEVICES), \
     echo "super_block_devices=$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)" >> $(1))
@@ -3885,7 +3890,7 @@
 .PHONY: otapackage
 otapackage: $(INTERNAL_OTA_PACKAGE_TARGET)
 
-ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
+ifeq ($(BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE),true)
 name := $(TARGET_PRODUCT)
 ifeq ($(TARGET_BUILD_TYPE),debug)
   name := $(name)_debug
@@ -3911,7 +3916,7 @@
 
 otapackage otardppackage: $(INTERNAL_OTA_RETROFIT_DYNAMIC_PARTITIONS_PACKAGE_TARGET)
 
-endif # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
+endif # BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE
 
 endif    # build_ota_package
 
@@ -4131,7 +4136,7 @@
 
 systemimage: $(INSTALLED_QEMU_SYSTEMIMAGE)
 droidcore: $(INSTALLED_QEMU_SYSTEMIMAGE)
-ifeq ($(BOARD_USES_VENDORIMAGE),true)
+ifdef INSTALLED_VENDORIMAGE_TARGET
 INSTALLED_QEMU_VENDORIMAGE := $(PRODUCT_OUT)/vendor-qemu.img
 $(INSTALLED_QEMU_VENDORIMAGE): $(INSTALLED_VENDORIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST) $(SIMG2IMG)
 	@echo Create vendor-qemu.img
@@ -4140,7 +4145,7 @@
 vendorimage: $(INSTALLED_QEMU_VENDORIMAGE)
 droidcore: $(INSTALLED_QEMU_VENDORIMAGE)
 endif
-ifeq ($(BOARD_USES_PRODUCTIMAGE),true)
+ifdef INSTALLED_PRODUCTIMAGE_TARGET
 INSTALLED_QEMU_PRODUCTIMAGE := $(PRODUCT_OUT)/product-qemu.img
 $(INSTALLED_QEMU_PRODUCTIMAGE): $(INSTALLED_PRODUCTIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST) $(SIMG2IMG)
 	@echo Create product-qemu.img
@@ -4149,7 +4154,7 @@
 productimage: $(INSTALLED_QEMU_PRODUCTIMAGE)
 droidcore: $(INSTALLED_QEMU_PRODUCTIMAGE)
 endif
-ifeq ($(BOARD_USES_PRODUCT_SERVICESIMAGE),true)
+ifdef INSTALLED_PRODUCT_SERVICESIMAGE_TARGET
 INSTALLED_QEMU_PRODUCT_SERVICESIMAGE := $(PRODUCT_OUT)/product_services-qemu.img
 $(INSTALLED_QEMU_PRODUCT_SERVICESIMAGE): $(INSTALLED_PRODUCT_SERVICESIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST) $(SIMG2IMG)
 	@echo Create product_services-qemu.img
@@ -4158,7 +4163,7 @@
 productservicesimage: $(INSTALLED_QEMU_PRODUCT_SERVICESIMAGE)
 droidcore: $(INSTALLED_QEMU_PRODUCT_SERVICESIMAGE)
 endif
-ifeq ($(BOARD_USES_ODMIMAGE),true)
+ifdef INSTALLED_ODMIMAGE_TARGET
 INSTALLED_QEMU_ODMIMAGE := $(PRODUCT_OUT)/odm-qemu.img
 $(INSTALLED_QEMU_ODMIMAGE): $(INSTALLED_ODMIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST)
 	@echo Create odm-qemu.img
diff --git a/core/OWNERS b/core/OWNERS
index 570ede8..750f1fa 100644
--- a/core/OWNERS
+++ b/core/OWNERS
@@ -1 +1,3 @@
 per-file dex_preopt*.mk = ngeoffray@google.com,calin@google.com,mathewi@google.com,dbrazdil@google.com
+per-file construct_context.sh = ngeoffray@google.com,calin@google.com,mathieuc@google.com
+per-file verify_uses_libraries.sh = ngeoffray@google.com,calin@google.com,mathieuc@google.com
diff --git a/core/android_manifest.mk b/core/android_manifest.mk
index c3af942..ed759c5 100644
--- a/core/android_manifest.mk
+++ b/core/android_manifest.mk
@@ -72,8 +72,8 @@
     my_manifest_fixer_flags += --uses-non-sdk-api
 endif
 
-ifeq (true,$(LOCAL_PREFER_INTEGRITY))
-    my_manifest_fixer_flags += --prefer-integrity
+ifeq (true,$(LOCAL_PREFER_CODE_INTEGRITY))
+    my_manifest_fixer_flags += --prefer-code-integrity
 endif
 
 $(fixed_android_manifest): PRIVATE_MANIFEST_FIXER_FLAGS := $(my_manifest_fixer_flags)
diff --git a/core/binary.mk b/core/binary.mk
index c3878f9..e7b0c52 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -913,8 +913,6 @@
 # Thus we'll actually generate source for each architecture.
 $(foreach s,$(vts_src),\
     $(eval $(call define-vts-cpp-rule,$(s),$(vts_gen_cpp_root),vts_gen_cpp)))
-$(foreach cpp,$(vts_gen_cpp), \
-    $(call include-depfile,$(addsuffix .vts.P,$(basename $(cpp))),$(cpp)))
 $(call track-src-file-gen,$(vts_src),$(vts_gen_cpp))
 
 $(vts_gen_cpp) : PRIVATE_MODULE := $(LOCAL_MODULE)
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 0fce502..b47071a 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -51,7 +51,6 @@
 LOCAL_CTS_TEST_RUNNER:=
 LOCAL_CXX:=
 LOCAL_CXX_STL := default
-LOCAL_DATA_BINDING:=
 LOCAL_DEX_PREOPT_APP_IMAGE:=
 LOCAL_DEX_PREOPT_FLAGS:=
 LOCAL_DEX_PREOPT_GENERATE_PROFILE:=
@@ -213,7 +212,7 @@
 LOCAL_PREBUILT_OBJ_FILES:=
 LOCAL_PREBUILT_STATIC_JAVA_LIBRARIES:=
 LOCAL_PREBUILT_STRIP_COMMENTS:=
-LOCAL_PREFER_INTEGRITY:=
+LOCAL_PREFER_CODE_INTEGRITY:=
 LOCAL_PRESUBMIT_DISABLED:=
 LOCAL_PRIVATE_PLATFORM_APIS:=
 LOCAL_PRIVILEGED_MODULE:=
diff --git a/core/config.mk b/core/config.mk
index 59b8de0..c0a159d 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -687,7 +687,7 @@
 else
 AVBTOOL := $(BOARD_CUSTOM_AVBTOOL)
 endif
-APICHECK := $(HOST_OUT_EXECUTABLES)/apicheck$(HOST_EXECUTABLE_SUFFIX)
+APICHECK := $(HOST_OUT_JAVA_LIBRARIES)/metalava$(COMMON_JAVA_PACKAGE_SUFFIX)
 FS_GET_STATS := $(HOST_OUT_EXECUTABLES)/fs_get_stats$(HOST_EXECUTABLE_SUFFIX)
 MAKE_EXT4FS := $(HOST_OUT_EXECUTABLES)/mke2fs$(HOST_EXECUTABLE_SUFFIX)
 MKEXTUSERIMG := $(HOST_OUT_EXECUTABLES)/mkuserimg_mke2fs
@@ -755,13 +755,7 @@
 MD5SUM:=md5sum
 endif
 
-APICHECK_CLASSPATH_ENTRIES := \
-    $(HOST_OUT_JAVA_LIBRARIES)/apicheck$(COMMON_JAVA_PACKAGE_SUFFIX) \
-    $(HOST_JDK_TOOLS_JAR) \
-    )
-APICHECK_CLASSPATH := $(subst $(space),:,$(strip $(APICHECK_CLASSPATH_ENTRIES)))
-
-APICHECK_COMMAND := $(APICHECK) -JXmx1024m -J"classpath $(APICHECK_CLASSPATH)"
+APICHECK_COMMAND := $(JAVA) -Xmx4g -jar $(APICHECK) --no-banner --compatible-output=yes
 
 # Boolean variable determining if the whitelist for compatible properties is enabled
 PRODUCT_COMPATIBLE_PROPERTY := false
@@ -1064,31 +1058,52 @@
 # The metadata device must be supplied to init via the kernel command-line.
 BOARD_KERNEL_CMDLINE += androidboot.super_partition=$(BOARD_SUPER_PARTITION_METADATA_DEVICE)
 
-else # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
+BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE := true
 
-# These should not be specified on devices launching with dynamic partition support.
-ifdef BOARD_SUPER_PARTITION_BLOCK_DEVICES
-$(error BOARD_SUPER_PARTITION_BLOCK_DEVICES can only be used if PRODUCT_RETROFIT_DYNAMIC_PARTITIONS is true.)
-endif
-ifdef BOARD_SUPER_PARTITION_METADATA_DEVICE
-$(error BOARD_SUPER_PARTITION_METADATA_DEVICE can only be used if PRODUCT_RETROFIT_DYNAMIC_PARTITIONS is true.)
-endif
+# If "vendor" is listed as one of the dynamic partitions but without its image available (e.g. an
+# AOSP target built without vendor image), don't build the retrofit full OTA package. Because we
+# won't be able to build meaningful super_* images for retrofitting purpose.
+ifneq (,$(filter vendor,$(BOARD_SUPER_PARTITION_PARTITION_LIST)))
+ifndef BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE
+ifndef BOARD_PREBUILT_VENDORIMAGE
+BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE :=
+endif # BOARD_PREBUILT_VENDORIMAGE
+endif # BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE
+endif # BOARD_SUPER_PARTITION_PARTITION_LIST
+
+else # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
 
 # For normal devices, we populate BOARD_SUPER_PARTITION_BLOCK_DEVICES so the
 # build can handle both cases consistently.
-BOARD_SUPER_PARTITION_BLOCK_DEVICES := super
+ifeq ($(BOARD_SUPER_PARTITION_METADATA_DEVICE),)
 BOARD_SUPER_PARTITION_METADATA_DEVICE := super
-BOARD_SUPER_PARTITION_SUPER_DEVICE_SIZE := $(BOARD_SUPER_PARTITION_SIZE)
+endif
+
+ifeq ($(BOARD_SUPER_PARTITION_BLOCK_DEVICES),)
+BOARD_SUPER_PARTITION_BLOCK_DEVICES := $(BOARD_SUPER_PARTITION_METADATA_DEVICE)
+endif
+
+# If only one super block device, default to super partition size.
+ifeq ($(word 2,$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)),)
+BOARD_SUPER_PARTITION_$(call to-upper,$(strip $(BOARD_SUPER_PARTITION_BLOCK_DEVICES)))_DEVICE_SIZE ?= \
+    $(BOARD_SUPER_PARTITION_SIZE)
+endif
+
+ifneq ($(BOARD_SUPER_PARTITION_METADATA_DEVICE),super)
+BOARD_KERNEL_CMDLINE += androidboot.super_partition=$(BOARD_SUPER_PARTITION_METADATA_DEVICE)
+endif
+BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE :=
 
 endif # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
 endif # BOARD_SUPER_PARTITION_SIZE
 .KATI_READONLY := BOARD_SUPER_PARTITION_BLOCK_DEVICES
 .KATI_READONLY := BOARD_SUPER_PARTITION_METADATA_DEVICE
+.KATI_READONLY := BOARD_BUILD_RETROFIT_DYNAMIC_PARTITIONS_OTA_PACKAGE
 
 $(foreach device,$(call to-upper,$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)), \
     $(eval BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE := $(strip $(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE))) \
     $(if $(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE),, \
-        $(error $(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE must not be empty))) \
+        $(error BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE must not be empty)) \
     $(eval .KATI_READONLY := BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE))
 
 endif # PRODUCT_BUILD_SUPER_PARTITION
diff --git a/core/definitions.mk b/core/definitions.mk
index 768403c..a9807f1 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -1023,7 +1023,7 @@
 @mkdir -p $(dir $@)
 @mkdir -p $(PRIVATE_HEADER_OUTPUT_DIR)
 @echo "Generating C++ from VTS: $(PRIVATE_MODULE) <= $<"
-$(hide) $(VTSC) -d$(basename $@).vts.P $(PRIVATE_VTS_FLAGS) \
+$(hide) $(VTSC) -TODO_b/120496070 $(PRIVATE_VTS_FLAGS) \
     $< $(PRIVATE_HEADER_OUTPUT_DIR) $@
 endef
 
@@ -2704,9 +2704,9 @@
 $(INTERNAL_PLATFORM_HIDDENAPI_FLAGS): $(2)
 $(INTERNAL_PLATFORM_HIDDENAPI_FLAGS): PRIVATE_FLAGS_INPUTS := $$(PRIVATE_FLAGS_INPUTS) $(2)
 
-$(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA): $(5)
+$(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA): $(3)
 $(INTERNAL_PLATFORM_HIDDENAPI_GREYLIST_METADATA): \
-    PRIVATE_METADATA_INPUTS := $$(PRIVATE_METADATA_INPUTS) $(5)
+    PRIVATE_METADATA_INPUTS := $$(PRIVATE_METADATA_INPUTS) $(3)
 
 endif
 endef
@@ -2904,7 +2904,7 @@
 define check-api
 $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/$(strip $(1))-timestamp: $(2) $(3) $(4) $(APICHECK) $(9)
 	@echo "Checking API:" $(1)
-	$(hide) ( $(APICHECK_COMMAND) $(6) $(2) $(3) $(4) $(5) || ( $(7) ; exit 38 ) )
+	$(hide) ( $(APICHECK_COMMAND) --check-api-files $(6) $(2) $(3) $(4) $(5) || ( $(7) ; exit 38 ) )
 	$(hide) mkdir -p $$(dir $$@)
 	$(hide) touch $$@
 $(8): $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/$(strip $(1))-timestamp
diff --git a/core/dex_preopt.mk b/core/dex_preopt.mk
index 59346ed..4d7d11c 100644
--- a/core/dex_preopt.mk
+++ b/core/dex_preopt.mk
@@ -88,7 +88,7 @@
 ifeq ($(PRODUCT_DIST_BOOT_AND_SYSTEM_JARS),true)
 boot_profile_jars_zip := $(PRODUCT_OUT)/boot_profile_jars.zip
 all_boot_jars := \
-  $(foreach m,$(DEXPREOPT_BOOT_JARS_MODULES),$(PRODUCT_OUT)/system/framework/$(m).jar) \
+  $(foreach m,$(PRODUCT_BOOT_JARS),$(PRODUCT_OUT)/system/framework/$(m).jar) \
   $(foreach m,$(PRODUCT_SYSTEM_SERVER_JARS),$(PRODUCT_OUT)/system/framework/$(m).jar)
 
 $(boot_profile_jars_zip): PRIVATE_JARS := $(all_boot_jars)
diff --git a/core/dex_preopt_config.mk b/core/dex_preopt_config.mk
index cc45689..0793516 100644
--- a/core/dex_preopt_config.mk
+++ b/core/dex_preopt_config.mk
@@ -1,9 +1,9 @@
 DEX_PREOPT_CONFIG := $(PRODUCT_OUT)/dexpreopt.config
 
 # list of boot classpath jars for dexpreopt
-DEXPREOPT_BOOT_JARS := $(subst $(space),:,$(PRODUCT_BOOT_JARS))
 DEXPREOPT_BOOT_JARS_MODULES := $(PRODUCT_BOOT_JARS)
-PRODUCT_BOOTCLASSPATH := $(subst $(space),:,$(foreach m,$(DEXPREOPT_BOOT_JARS_MODULES),/system/framework/$(m).jar))
+PRODUCT_BOOTCLASSPATH_JARS := $(strip $(DEXPREOPT_BOOT_JARS_MODULES))
+PRODUCT_BOOTCLASSPATH := $(subst $(space),:,$(foreach m,$(PRODUCT_BOOTCLASSPATH_JARS),/system/framework/$(m).jar))
 
 PRODUCT_SYSTEM_SERVER_CLASSPATH := $(subst $(space),:,$(foreach m,$(PRODUCT_SYSTEM_SERVER_JARS),/system/framework/$(m).jar))
 
@@ -13,6 +13,9 @@
 DEXPREOPT_BOOT_JAR_DIR := system/framework
 DEXPREOPT_BOOT_JAR_DIR_FULL_PATH := $(DEXPREOPT_PRODUCT_DIR_FULL_PATH)/$(DEXPREOPT_BOOT_JAR_DIR)
 
+DEXPREOPT_BOOTCLASSPATH_DEX_LOCATIONS := $(foreach m,$(PRODUCT_BOOTCLASSPATH_JARS),/$(DEXPREOPT_BOOT_JAR_DIR)/$(m).jar)
+DEXPREOPT_BOOTCLASSPATH_DEX_FILES := $(foreach jar,$(DEXPREOPT_BOOTCLASSPATH_DEX_LOCATIONS),$(PRODUCT_OUT)$(jar))
+
 DEFAULT_DEX_PREOPT_BUILT_IMAGE_LOCATION := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/boot.art
 DEFAULT_DEX_PREOPT_BUILT_IMAGE_FILENAME := $(DEXPREOPT_BOOT_JAR_DIR_FULL_PATH)/$(DEX2OAT_TARGET_ARCH)/boot.art
 
@@ -112,7 +115,9 @@
   $(call add_json_bool, HasSystemOther,                     $(BOARD_USES_SYSTEM_OTHER_ODEX))
   $(call add_json_list, PatternsOnSystemOther,              $(SYSTEM_OTHER_ODEX_FILTER))
   $(call add_json_bool, DisableGenerateProfile,             $(filter false,$(WITH_DEX_PREOPT_GENERATE_PROFILE)))
-  $(call add_json_list, BootJars,                           $(DEXPREOPT_BOOT_JARS_MODULES))
+  $(call add_json_list, PreoptBootClassPathDexFiles,        $(DEXPREOPT_BOOTCLASSPATH_DEX_FILES))
+  $(call add_json_list, PreoptBootClassPathDexLocations,    $(DEXPREOPT_BOOTCLASSPATH_DEX_LOCATIONS))
+  $(call add_json_list, BootJars,                           $(PRODUCT_BOOT_JARS))
   $(call add_json_list, SystemServerJars,                   $(PRODUCT_SYSTEM_SERVER_JARS))
   $(call add_json_list, SystemServerApps,                   $(PRODUCT_SYSTEM_SERVER_APPS))
   $(call add_json_list, SpeedApps,                          $(PRODUCT_DEXPREOPT_SPEED_APPS))
diff --git a/core/dex_preopt_libart_boot.mk b/core/dex_preopt_libart_boot.mk
index 156ce02..b31f5a8 100644
--- a/core/dex_preopt_libart_boot.mk
+++ b/core/dex_preopt_libart_boot.mk
@@ -90,11 +90,13 @@
 	@echo "target dex2oat: $@"
 	@mkdir -p $(dir $@)
 	@mkdir -p $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))
-	@rm -f $(dir $@)/*.art $(dir $@)/*.oat
+	@rm -f $(dir $@)/*.art $(dir $@)/*.oat $(dir $@)/*.invocation
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.art
 	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.oat
+	@rm -f $(dir $($(PRIVATE_2ND_ARCH_VAR_PREFIX)LIBART_TARGET_BOOT_OAT_UNSTRIPPED))/*.invocation
 	$(hide) $(DEX2OAT_BOOT_IMAGE_LOG_TAGS) $(DEX2OAT) --runtime-arg -Xms$(DEX2OAT_IMAGE_XMS) \
 		--avoid-storing-invocation \
+		--write-invocation-to=$(patsubst %.art,%.invocation,$@) \
 		--runtime-arg -Xmx$(DEX2OAT_IMAGE_XMX) \
 		$(PRIVATE_BOOT_IMAGE_FLAGS) \
 		$(addprefix --dex-file=,$(LIBART_TARGET_BOOT_DEX_FILES)) \
diff --git a/core/dex_preopt_odex_install.mk b/core/dex_preopt_odex_install.mk
index 2675e41..69790cb 100644
--- a/core/dex_preopt_odex_install.mk
+++ b/core/dex_preopt_odex_install.mk
@@ -3,7 +3,7 @@
 # Output variables: LOCAL_DEX_PREOPT, LOCAL_UNCOMPRESS_DEX, built_odex,
 #                   dexpreopt_boot_jar_module
 
-ifeq (true,$(LOCAL_PREFER_INTEGRITY))
+ifeq (true,$(LOCAL_PREFER_CODE_INTEGRITY))
   LOCAL_UNCOMPRESS_DEX := true
 else
   LOCAL_UNCOMPRESS_DEX :=
@@ -181,7 +181,7 @@
   $(call add_json_str,  BuildPath,                     $(LOCAL_BUILT_MODULE))
   $(call add_json_str,  DexPath,                       $$1)
   $(call add_json_str,  ExtrasOutputPath,              $$2)
-  $(call add_json_bool, PreferIntegrity,               $(filter true,$(LOCAL_PREFER_INTEGRITY)))
+  $(call add_json_bool, PreferCodeIntegrity,           $(filter true,$(LOCAL_PREFER_CODE_INTEGRITY)))
   $(call add_json_bool, Privileged,                    $(filter true,$(LOCAL_PRIVILEGED_MODULE)))
   $(call add_json_bool, UncompressedDex,               $(filter true,$(LOCAL_UNCOMPRESS_DEX)))
   $(call add_json_bool, HasApkLibraries,               $(LOCAL_APK_LIBRARIES))
@@ -202,6 +202,7 @@
   $(call add_json_bool, ForceCreateAppImage,           $(filter true,$(LOCAL_DEX_PREOPT_APP_IMAGE)))
   $(call add_json_bool, PresignedPrebuilt,             $(filter PRESIGNED,$(LOCAL_CERTIFICATE)))
 
+  $(call add_json_bool, NoStripping,                   $(filter nostripping,$(LOCAL_DEX_PREOPT)))
   $(call add_json_str,  StripInputPath,                $$1)
   $(call add_json_str,  StripOutputPath,               $$2)
 
diff --git a/core/goma.mk b/core/goma.mk
index 3787dfd..f5064e6 100644
--- a/core/goma.mk
+++ b/core/goma.mk
@@ -17,6 +17,7 @@
 # Notice: this works only with Google's Goma build infrastructure.
 ifneq ($(filter-out false,$(USE_GOMA)),)
   # Goma requires a lot of processes and file descriptors.
+  # TODO(yyanagisawa): move these code to build/soong/uil/build/goma.go
   ifeq ($(shell echo $$(($$(ulimit -u) < 2500 || $$(ulimit -n) < 16000))),1)
     $(warning Max user processes and/or open files are insufficient)
     ifeq ($(shell uname),Darwin)
@@ -31,26 +32,13 @@
   else
     goma_dir := $(HOME)/goma
   endif
-  goma_ctl := $(goma_dir)/goma_ctl.py
   GOMA_CC := $(goma_dir)/gomacc
 
-  $(if $(wildcard $(goma_ctl)),, \
-   $(warning You should have goma in $$GOMA_DIR or $(HOME)/goma) \
-   $(error See go/ma/how-to-use-goma/how-to-use-goma-for-android for detail))
-
   # Append gomacc to existing *_WRAPPER variables so it's possible to
   # use both ccache and gomacc.
   CC_WRAPPER := $(strip $(CC_WRAPPER) $(GOMA_CC))
   CXX_WRAPPER := $(strip $(CXX_WRAPPER) $(GOMA_CC))
   JAVAC_WRAPPER := $(strip $(JAVAC_WRAPPER) $(GOMA_CC))
 
-  # gomacc can start goma client's daemon process automatically, but
-  # it is safer and faster to start up it beforehand. We run this as a
-  # background process so this won't slow down the build.
-  ifndef NOSTART_GOMA
-    $(shell ( $(goma_ctl) ensure_start ) &> /dev/null &)
-  endif
-
-  goma_ctl :=
   goma_dir :=
 endif
diff --git a/core/java_renderscript.mk b/core/java_renderscript.mk
index 406d679..13a6f8e 100644
--- a/core/java_renderscript.mk
+++ b/core/java_renderscript.mk
@@ -82,8 +82,8 @@
 $(rs_generated_src_jar): $(renderscript_sources_fullpath) $(LOCAL_RENDERSCRIPT_CC) $(SOONG_ZIP)
 	$(transform-renderscripts-to-java-and-bc)
 
-# include the dependency files (.d/.P) generated by llvm-rs-cc.
-$(call include-depfile,$(rs_generated_src_jar).P,$(rs_generated_src_jar))
+# include the dependency files (.d) generated by llvm-rs-cc.
+$(call include-depfile,$(rs_generated_src_jar).d,$(rs_generated_src_jar))
 
 ifneq ($(LOCAL_RENDERSCRIPT_COMPATIBILITY),)
 
diff --git a/core/package_internal.mk b/core/package_internal.mk
index a46d76a..75cc547 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -87,6 +87,23 @@
   LOCAL_RESOURCE_DIR := $(foreach d,$(LOCAL_RESOURCE_DIR),$(call clean-path,$(d)))
 endif
 
+# If LOCAL_MODULE matches a rule in PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES,
+# override the manfest package name by the (first) rule matched
+override_manifest_name := $(strip $(word 1,\
+  $(foreach rule,$(PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES),\
+    $(eval _pkg_name_pat := $(call word-colon,1,$(rule)))\
+    $(eval _manifest_name_pat := $(call word-colon,2,$(rule)))\
+    $(if $(filter $(_pkg_name_pat),$(LOCAL_MODULE)),\
+      $(patsubst $(_pkg_name_pat),$(_manifest_name_pat),$(LOCAL_MODULE))\
+     )\
+   )\
+))
+
+ifneq (,$(override_manifest_name))
+# Note: this can override LOCAL_MANFEST_PACKAGE_NAME value set in Android.mk
+LOCAL_MANIFEST_PACKAGE_NAME := $(override_manifest_name)
+endif
+
 include $(BUILD_SYSTEM)/force_aapt2.mk
 
 # Process Support Library dependencies.
@@ -309,23 +326,6 @@
 
 rs_compatibility_jni_libs :=
 
-ifeq ($(LOCAL_DATA_BINDING),true)
-data_binding_intermediates := $(intermediates.COMMON)/data-binding
-
-LOCAL_JAVACFLAGS += -processorpath $(DATA_BINDING_COMPILER) -s $(data_binding_intermediates)/anno-src
-
-LOCAL_STATIC_JAVA_LIBRARIES += databinding-baselibrary
-LOCAL_STATIC_JAVA_AAR_LIBRARIES += databinding-library databinding-adapters
-
-data_binding_res_in := $(LOCAL_RESOURCE_DIR)
-data_binding_res_out := $(data_binding_intermediates)/res
-
-# Replace with the processed merged res dir.
-LOCAL_RESOURCE_DIR := $(data_binding_res_out)
-
-LOCAL_AAPT_FLAGS += --auto-add-overlay --extra-packages com.android.databinding.library
-endif  # LOCAL_DATA_BINDING
-
 # If the module is a compressed module, we don't pre-opt it because its final
 # installation location will be the data partition.
 ifdef LOCAL_COMPRESSED_MODULE
@@ -460,34 +460,6 @@
 $(LOCAL_INTERMEDIATE_TARGETS): \
     PRIVATE_ANDROID_MANIFEST := $(full_android_manifest)
 
-ifeq ($(LOCAL_DATA_BINDING),true)
-data_binding_stamp := $(data_binding_intermediates)/data-binding.stamp
-$(data_binding_stamp): PRIVATE_INTERMEDIATES := $(data_binding_intermediates)
-$(data_binding_stamp): PRIVATE_MANIFEST := $(full_android_manifest)
-# Generate code into $(LOCAL_INTERMEDIATE_SOURCE_DIR) so that the generated .java files
-# will be automatically picked up by function compile-java.
-$(data_binding_stamp): PRIVATE_SRC_OUT := $(LOCAL_INTERMEDIATE_SOURCE_DIR)/data-binding
-$(data_binding_stamp): PRIVATE_XML_OUT := $(data_binding_intermediates)/xml
-$(data_binding_stamp): PRIVATE_RES_OUT := $(data_binding_res_out)
-$(data_binding_stamp): PRIVATE_RES_IN := $(data_binding_res_in)
-$(data_binding_stamp): PRIVATE_ANNO_SRC_DIR := $(data_binding_intermediates)/anno-src
-
-$(data_binding_stamp) : $(all_res_assets) $(full_android_manifest) \
-    $(DATA_BINDING_COMPILER)
-	@echo "Data-binding process: $@"
-	@rm -rf $(PRIVATE_INTERMEDIATES) $(PRIVATE_SRC_OUT) && \
-	  mkdir -p $(PRIVATE_INTERMEDIATES) $(PRIVATE_SRC_OUT) \
-	      $(PRIVATE_XML_OUT) $(PRIVATE_RES_OUT) $(PRIVATE_ANNO_SRC_DIR)
-	$(hide) $(JAVA) -classpath $(DATA_BINDING_COMPILER) android.databinding.tool.MakeCopy \
-	  $(PRIVATE_MANIFEST) $(PRIVATE_SRC_OUT) $(PRIVATE_XML_OUT) $(PRIVATE_RES_OUT) $(PRIVATE_RES_IN)
-	$(hide) touch $@
-
-# Make sure the data-binding process happens before javac and generation of R.java.
-$(R_file_stamp): $(data_binding_stamp)
-$(java_source_list_file): $(data_binding_stamp)
-$(full_classes_compiled_jar): $(data_binding_stamp)
-endif  # LOCAL_DATA_BINDING
-
 framework_res_package_export :=
 
 ifneq ($(LOCAL_NO_STANDARD_LIBRARIES),true)
@@ -678,8 +650,8 @@
 	@# Keep a copy of apk with classes.dex unstripped
 	$(hide) cp -f $@ $(dir $@)package.dex.apk
 endif  # BUILD_PLATFORM_ZIP
-	$(PRIVATE_STRIP_SCRIPT) $@ $@.tmp
-	mv -f $@.tmp $@
+	mv -f $@ $@.tmp
+	$(PRIVATE_STRIP_SCRIPT) $@.tmp $@
 endif  # LOCAL_DEX_PREOPT
 	$(sign-package)
 ifdef LOCAL_COMPRESSED_MODULE
diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index 013497f..66913c1 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -357,12 +357,14 @@
 ifneq ($(BUILD_PLATFORM_ZIP),)
 $(built_module) : .KATI_IMPLICIT_OUTPUTS := $(dir $(LOCAL_BUILT_MODULE))package.dex.apk
 endif
+ifneq ($(LOCAL_CERTIFICATE),PRESIGNED)
 ifdef LOCAL_DEX_PREOPT
 $(built_module) : PRIVATE_STRIP_SCRIPT := $(intermediates)/strip.sh
 $(built_module) : $(intermediates)/strip.sh
 $(built_module) : | $(DEXPREOPT_GEN_DEPS)
 $(built_module) : .KATI_DEPFILE := $(built_module).d
 endif
+endif
 $(built_module) : $(my_prebuilt_src_file) | $(ZIPALIGN) $(ZIP2ZIP) $(SIGNAPK_JAR)
 	$(transform-prebuilt-to-target)
 	$(uncompress-prebuilt-embedded-jni-libs)
@@ -387,8 +389,8 @@
 	$(run-appcompat)
 endif  # module_run_appcompat
 ifdef LOCAL_DEX_PREOPT
-	$(PRIVATE_STRIP_SCRIPT) $@ $@.tmp
-	mv -f $@.tmp $@
+	mv -f $@ $@.tmp
+	$(PRIVATE_STRIP_SCRIPT) $@.tmp $@
 endif  # LOCAL_DEX_PREOPT
 	$(sign-package)
 	# No need for align-package because sign-package takes care of alignment
diff --git a/core/product.mk b/core/product.mk
index 8497b28..1420b46 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -213,6 +213,7 @@
     PRODUCT_RETROFIT_DYNAMIC_PARTITIONS \
     PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS \
     PRODUCT_XOM_EXCLUDE_PATHS \
+    PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES \
 
 define dump-product
 $(info ==== $(1) ====)\
diff --git a/core/product_config.mk b/core/product_config.mk
index ac7fe91..47b4c7a 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -175,15 +175,9 @@
 include $(BUILD_SYSTEM)/product.mk
 include $(BUILD_SYSTEM)/device.mk
 
-ifneq ($(strip $(TARGET_BUILD_APPS)),)
-# An unbundled app build needs only the core product makefiles.
-all_product_configs := $(call get-product-makefiles,\
-    $(SRC_TARGET_DIR)/product/AndroidProducts.mk)
-else
 # Read in all of the product definitions specified by the AndroidProducts.mk
 # files in the tree.
 all_product_configs := $(get-all-product-makefiles)
-endif
 
 all_named_products :=
 
@@ -352,6 +346,11 @@
 # used for adding properties to default.prop
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_DEFAULT_PROPERTY_OVERRIDES))
+
+$(foreach rule,$(PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES),\
+    $(if $(filter 2,$(words $(subst :,$(space),$(rule)))),,\
+        $(error Rule "$(rule)" in PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDE is not <module_name>:<manifest_name>)))
+
 .KATI_READONLY := PRODUCT_DEFAULT_PROPERTY_OVERRIDES
 
 # A list of property assignments, like "key = value", with zero or more
@@ -555,3 +554,10 @@
 # set this variable to prevent OTA failures.
 PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS))
+
+# List of <module_name>:<manifest_name> pairs to override the manifest package name
+# of a module <module_name> to <manifest_name>. Patterns can be used as in
+# com.android.%:com.acme.android.%.release
+PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES))
+.KATI_READONLY := PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 85be1e7..31c77d4 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -144,6 +144,8 @@
 
 $(call add_json_str,  DexpreoptGlobalConfig,             $(DEX_PREOPT_CONFIG))
 
+$(call add_json_list, ManifestPackageNameOverrides,      $(PRODUCT_MANIFEST_PACKAGE_NAME_OVERRIDES))
+
 $(call add_json_map, VendorVars)
 $(foreach namespace,$(SOONG_CONFIG_NAMESPACES),\
   $(call add_json_map, $(namespace))\
diff --git a/envsetup.sh b/envsetup.sh
index 44ae659..62a64b6 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -772,6 +772,9 @@
 {
     local TOPFILE=build/make/core/envsetup.mk
     local HERE=$PWD
+    if [ "$1" ]; then
+        \cd $1
+    fi;
     local T=
     while [ \( ! \( -f $TOPFILE \) \) -a \( $PWD != "/" \) ]; do
         T=`PWD= /bin/pwd`
@@ -852,24 +855,29 @@
             # Remove the leading ./ and trailing / if any exists.
             DIR=${DIR#./}
             DIR=${DIR%/}
-            if [ -f $DIR/Android.mk -o -f $DIR/Android.bp ]; then
-                local TO_CHOP=`(\cd -P -- $T && pwd -P) | wc -c | tr -d ' '`
-                local TO_CHOP=`expr $TO_CHOP + 1`
-                local START=`PWD= /bin/pwd`
-                local MDIR=`echo $START | cut -c${TO_CHOP}-`
-                if [ "$MDIR" = "" ] ; then
-                    MDIR=$DIR
-                else
-                    MDIR=$MDIR/$DIR
+            local M
+            if [ "$DIR_MODULES" = "" ]; then
+                M=$(findmakefile $DIR)
+            else
+                # Only check the target directory if a module is specified.
+                if [ -f $DIR/Android.mk -o -f $DIR/Android.bp ]; then
+                    local HERE=$PWD
+                    cd $DIR
+                    M=`PWD= /bin/pwd`
+                    M=$M/Android.mk
+                    cd $HERE
                 fi
-                MDIR=${MDIR%/.}
+            fi
+            if [ "$M" ]; then
+                # Remove the path to top as the makefilepath needs to be relative
+                local M=`echo $M|sed 's:'$T'/::'`
                 if [ "$DIR_MODULES" = "" ]; then
-                    MODULES_IN_PATHS="$MODULES_IN_PATHS MODULES-IN-$MDIR"
-                    GET_INSTALL_PATHS="$GET_INSTALL_PATHS GET-INSTALL-PATH-IN-$MDIR"
+                    MODULES_IN_PATHS="$MODULES_IN_PATHS MODULES-IN-$(dirname ${M})"
+                    GET_INSTALL_PATHS="$GET_INSTALL_PATHS GET-INSTALL-PATH-IN-$(dirname ${M})"
                 else
                     MODULES="$MODULES $DIR_MODULES"
                 fi
-                MAKEFILE="$MAKEFILE $MDIR/Android.mk"
+                MAKEFILE="$MAKEFILE $M"
             else
                 case $DIR in
                   showcommands | snod | dist | *=*) ARGS="$ARGS $DIR";;
diff --git a/target/Android.mk b/target/Android.mk
deleted file mode 100644
index 9929b00..0000000
--- a/target/Android.mk
+++ /dev/null
@@ -1,23 +0,0 @@
-#
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-LOCAL_PATH := $(call my-dir)
-
-# Only if this Android.mk was included not by a symlink should it be used.
-# This facilitates the transition away from symlinks: b/64397960
-ifeq ($(LOCAL_PATH),build/make/target)
-include $(call first-makefiles-under,$(LOCAL_PATH))
-endif
diff --git a/target/board/BoardConfigEmuCommon.mk b/target/board/BoardConfigEmuCommon.mk
index 38f79fd..1e325b9 100644
--- a/target/board/BoardConfigEmuCommon.mk
+++ b/target/board/BoardConfigEmuCommon.mk
@@ -20,8 +20,6 @@
 # the GLES renderer disables itself if host GL acceleration isn't available.
 USE_OPENGL_RENDERER := true
 
-TARGET_COPY_OUT_VENDOR := vendor
-
 # ~100 MB vendor image. Please adjust system image / vendor image sizes
 # when finalizing them. The partition size needs to be a multiple of image
 # block size: 4096.
@@ -31,4 +29,4 @@
 DEVICE_MATRIX_FILE   := device/generic/goldfish/compatibility_matrix.xml
 
 BOARD_SEPOLICY_DIRS += device/generic/goldfish/sepolicy/common
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index 73af020..f9e9ee1 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -6,6 +6,9 @@
 
 include build/make/target/board/BoardConfigMainlineCommon.mk
 
+# Enable system property split for Treble
+BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+
 # This flag is set by mainline but isn't desired for GSI.
 BOARD_USES_SYSTEM_OTHER_ODEX :=
 
@@ -14,9 +17,21 @@
 # we explicit specify this need below (even though it's the current default).
 TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
 
+# system.img is always ext4 with sparse option
+# GSI also includes make_f2fs to support userdata parition in f2fs
+# for some devices
+TARGET_USERIMAGES_USE_F2FS := true
+
 # Enable dynamic system image size and reserved 64MB in it.
 BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE := 67108864
 
+# GSI always requires separate vendor packages to vendor.img
+TARGET_COPY_OUT_VENDOR := vendor
+
+# Creates metadata partition mount point under root for
+# the devices with metadata parition
+BOARD_USES_METADATA_PARTITION := true
+
 # Android Verified Boot (AVB):
 #   Set AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED (--flag 2) in
 #   vbmeta.img to disable AVB verification.
@@ -32,15 +47,13 @@
 BOARD_AVB_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
 BOARD_AVB_SYSTEM_ROLLBACK_INDEX_LOCATION := 1
 
+# GSI specific System Properties
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 # GSI is always userdebug and needs a couple of properties taking precedence
 # over those set by the vendor.
 TARGET_SYSTEM_PROP := build/make/target/board/gsi_system.prop
 endif
 
-# Android generic system image always create metadata partition
-BOARD_USES_METADATA_PARTITION := true
-
 # Set this to create /cache mount point for non-A/B devices that mounts /cache.
 # The partition size doesn't matter, just to make build pass.
 BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/board/generic/BoardConfig.mk b/target/board/generic/BoardConfig.mk
index 738c037..cdb1d29 100644
--- a/target/board/generic/BoardConfig.mk
+++ b/target/board/generic/BoardConfig.mk
@@ -16,9 +16,10 @@
 # arm emulator specific definitions
 TARGET_ARCH := arm
 
-# Note: Before Pi, we built the platform images for ARMv7-A _without_ NEON.
+# Note: Before P, we built the platform images for ARMv7-A _without_ NEON.
+# Note: Before Q, we built the CTS and SDK images for ARMv7-A _without_ NEON.
 #
-ifneq ($(TARGET_BUILD_APPS)$(filter cts sdk,$(MAKECMDGOALS)),)
+ifneq ($(TARGET_BUILD_APPS),)
 # DO NOT USE
 #
 # This architecture variant should NOT be used for 32 bit arm platform
diff --git a/target/board/generic_arm64/BoardConfig.mk b/target/board/generic_arm64/BoardConfig.mk
index 1b6429c..3331d18 100644
--- a/target/board/generic_arm64/BoardConfig.mk
+++ b/target/board/generic_arm64/BoardConfig.mk
@@ -23,7 +23,7 @@
 TARGET_2ND_CPU_ABI := armeabi-v7a
 TARGET_2ND_CPU_ABI2 := armeabi
 
-ifneq ($(TARGET_BUILD_APPS)$(filter cts vts sdk,$(MAKECMDGOALS)),)
+ifneq ($(TARGET_BUILD_APPS)$(filter cts sdk vts,$(MAKECMDGOALS)),)
 # DO NOT USE
 # DO NOT USE
 #
@@ -41,7 +41,11 @@
 #
 # DO NOT USE
 # DO NOT USE
+ifneq ($(filter cts sdk vts,$(MAKECMDGOALS)),)
+TARGET_2ND_ARCH_VARIANT := armv7-a-neon
+else
 TARGET_2ND_ARCH_VARIANT := armv7-a
+endif
 # DO NOT USE
 # DO NOT USE
 TARGET_2ND_CPU_VARIANT := generic
diff --git a/target/board/generic_arm64_a/BoardConfig.mk b/target/board/generic_arm64_a/BoardConfig.mk
index 34a8ac0..68aedfc 100644
--- a/target/board/generic_arm64_a/BoardConfig.mk
+++ b/target/board/generic_arm64_a/BoardConfig.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_64.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_ARCH := arm64
 TARGET_ARCH_VARIANT := armv8-a
@@ -27,3 +27,6 @@
 TARGET_2ND_CPU_ABI := armeabi-v7a
 TARGET_2ND_CPU_ABI2 := armeabi
 TARGET_2ND_CPU_VARIANT := generic
+
+# This is a non-system-as-root Legacy GSI build target
+BOARD_BUILD_SYSTEM_ROOT_IMAGE := false
diff --git a/target/board/generic_arm64_ab/BoardConfig.mk b/target/board/generic_arm64_ab/BoardConfig.mk
index 88b90a8..6e54d81 100644
--- a/target/board/generic_arm64_ab/BoardConfig.mk
+++ b/target/board/generic_arm64_ab/BoardConfig.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_64.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_ARCH := arm64
 TARGET_ARCH_VARIANT := armv8-a
@@ -28,21 +28,12 @@
 TARGET_2ND_CPU_ABI2 := armeabi
 TARGET_2ND_CPU_VARIANT := generic
 
-# Enable A/B update
-TARGET_NO_RECOVERY := true
-BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
-
 # TODO(jiyong) These might be SoC specific.
 BOARD_ROOT_EXTRA_FOLDERS += firmware firmware/radio persist
 BOARD_ROOT_EXTRA_SYMLINKS += /vendor/lib/dsp:/dsp
 BOARD_ROOT_EXTRA_SYMLINKS += /vendor/firmware_mnt/image:/firmware/image
 BOARD_ROOT_EXTRA_SYMLINKS += /vendor/firmware_mnt/verinfo:/firmware/verinfo
 
-# Set this to create /cache mount point for non-A/B devices that mounts /cache.
-# The partition size doesn't matter, just to make build pass.
-BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
-BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
-
 # TODO(b/36764215): remove this setting when the generic system image
 # no longer has QCOM-specific directories under /.
 BOARD_SEPOLICY_DIRS += build/target/board/generic_arm64_ab/sepolicy
diff --git a/target/board/generic_arm_a/BoardConfig.mk b/target/board/generic_arm_a/BoardConfig.mk
index 57a5196..464a74f 100644
--- a/target/board/generic_arm_a/BoardConfig.mk
+++ b/target/board/generic_arm_a/BoardConfig.mk
@@ -14,10 +14,16 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_32.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
 TARGET_CPU_ABI := armeabi-v7a
 TARGET_CPU_ABI2 := armeabi
 TARGET_CPU_VARIANT := generic
+
+# Legacy GSI keeps 32 bits binder for 32 bits CPU Arch
+TARGET_USES_64_BIT_BINDER := false
+
+# This is a non-system-as-root Legacy GSI build target
+BOARD_BUILD_SYSTEM_ROOT_IMAGE := false
diff --git a/target/board/generic_arm_ab/BoardConfig.mk b/target/board/generic_arm_ab/BoardConfig.mk
index 3d14842..9100094 100644
--- a/target/board/generic_arm_ab/BoardConfig.mk
+++ b/target/board/generic_arm_ab/BoardConfig.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_32.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
@@ -22,9 +22,8 @@
 TARGET_CPU_ABI2 := armeabi
 TARGET_CPU_VARIANT := generic
 
-# Enable A/B update
-TARGET_NO_RECOVERY := true
-BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+# Legacy GSI keeps 32 bits binder for 32 bits CPU Arch
+TARGET_USES_64_BIT_BINDER := false
 
 # TODO(jiyong) These might be SoC specific.
 BOARD_ROOT_EXTRA_FOLDERS += firmware firmware/radio persist
@@ -32,11 +31,6 @@
 BOARD_ROOT_EXTRA_SYMLINKS += /vendor/firmware_mnt/image:/firmware/image
 BOARD_ROOT_EXTRA_SYMLINKS += /vendor/firmware_mnt/verinfo:/firmware/verinfo
 
-# Set this to create /cache mount point for non-A/B devices that mounts /cache.
-# The partition size doesn't matter, just to make build pass.
-BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
-BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
-
 # TODO(b/36764215): remove this setting when the generic system image
 # no longer has QCOM-specific directories under /.
 BOARD_SEPOLICY_DIRS += build/target/board/generic_arm64_ab/sepolicy
diff --git a/target/board/generic_x86_64_a/BoardConfig.mk b/target/board/generic_x86_64_a/BoardConfig.mk
index 2c02604..07eef4f 100644
--- a/target/board/generic_x86_64_a/BoardConfig.mk
+++ b/target/board/generic_x86_64_a/BoardConfig.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_64.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_CPU_ABI := x86_64
 TARGET_ARCH := x86_64
@@ -23,3 +23,6 @@
 TARGET_2ND_CPU_ABI := x86
 TARGET_2ND_ARCH := x86
 TARGET_2ND_ARCH_VARIANT := x86_64
+
+# This is a non-system-as-root Legacy GSI build target
+BOARD_BUILD_SYSTEM_ROOT_IMAGE := false
diff --git a/target/board/generic_x86_64_ab/BoardConfig.mk b/target/board/generic_x86_64_ab/BoardConfig.mk
index a098dfe..1dd5e48 100644
--- a/target/board/generic_x86_64_ab/BoardConfig.mk
+++ b/target/board/generic_x86_64_ab/BoardConfig.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_64.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_CPU_ABI := x86_64
 TARGET_ARCH := x86_64
@@ -23,12 +23,3 @@
 TARGET_2ND_CPU_ABI := x86
 TARGET_2ND_ARCH := x86
 TARGET_2ND_ARCH_VARIANT := x86_64
-
-# Set this to create /cache mount point for non-A/B devices that mounts /cache.
-# The partition size doesn't matter, just to make build pass.
-BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
-BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
-
-# Enable A/B update
-TARGET_NO_RECOVERY := true
-BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
diff --git a/target/board/generic_x86_a/BoardConfig.mk b/target/board/generic_x86_a/BoardConfig.mk
index 67cb07d..e3e8a3a 100644
--- a/target/board/generic_x86_a/BoardConfig.mk
+++ b/target/board/generic_x86_a/BoardConfig.mk
@@ -14,8 +14,14 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_32.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_CPU_ABI := x86
 TARGET_ARCH := x86
 TARGET_ARCH_VARIANT := x86
+
+# Legacy GSI keeps 32 bits binder for 32 bits CPU Arch
+TARGET_USES_64_BIT_BINDER := false
+
+# This is a non-system-as-root Legacy GSI build target
+BOARD_BUILD_SYSTEM_ROOT_IMAGE := false
diff --git a/target/board/generic_x86_ab/BoardConfig.mk b/target/board/generic_x86_ab/BoardConfig.mk
index db4dacd..53acffd 100644
--- a/target/board/generic_x86_ab/BoardConfig.mk
+++ b/target/board/generic_x86_ab/BoardConfig.mk
@@ -14,17 +14,11 @@
 # limitations under the License.
 #
 
-include build/make/target/board/treble_common_32.mk
+include build/make/target/board/BoardConfigGsiCommon.mk
 
 TARGET_CPU_ABI := x86
 TARGET_ARCH := x86
 TARGET_ARCH_VARIANT := x86
 
-# Set this to create /cache mount point for non-A/B devices that mounts /cache.
-# The partition size doesn't matter, just to make build pass.
-BOARD_CACHEIMAGE_FILE_SYSTEM_TYPE := ext4
-BOARD_CACHEIMAGE_PARTITION_SIZE := 16777216
-
-# Enable A/B update
-TARGET_NO_RECOVERY := true
-BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
+# Legacy GSI keeps 32 bits binder for 32 bits CPU Arch
+TARGET_USES_64_BIT_BINDER := false
diff --git a/target/board/treble_common.mk b/target/board/treble_common.mk
deleted file mode 100644
index eda5b37..0000000
--- a/target/board/treble_common.mk
+++ /dev/null
@@ -1,69 +0,0 @@
-#
-# Copyright (C) 2017 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# VNDK
-BOARD_VNDK_VERSION := current
-
-# Properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
-
-# Bootloader, kernel and recovery are not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-# GSI also includes make_f2fs to support userdata parition in f2fs
-# for some devices
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_USE_F2FS := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-
-# Enable dynamic system image size and reserved 64MB in it.
-BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE := 67108864
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Android generic system image always create metadata partition
-BOARD_USES_METADATA_PARTITION := true
-
-# Set emulator framebuffer display device buffer count to 3
-NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
-
-# Audio
-USE_XML_AUDIO_POLICY_CONF := 1
-
-# Android Verified Boot (AVB):
-#   1) Sets BOARD_AVB_ENABLE to sign the GSI image.
-#   2) Sets AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED (--flag 2) in
-#      vbmeta.img to disable AVB verification.
-#
-# To disable AVB for GSI, use the vbmeta.img and the GSI together.
-# To enable AVB for GSI, include the GSI public key into the device-specific
-# vbmeta.img.
-BOARD_AVB_ENABLE := true
-BOARD_AVB_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
-BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --flag 2
-
-# Enable chain partition for system.
-BOARD_AVB_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
-BOARD_AVB_SYSTEM_ALGORITHM := SHA256_RSA2048
-BOARD_AVB_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
-BOARD_AVB_SYSTEM_ROLLBACK_INDEX_LOCATION := 1
diff --git a/target/board/treble_common_32.mk b/target/board/treble_common_32.mk
deleted file mode 100644
index b66c41e..0000000
--- a/target/board/treble_common_32.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-#
-# Copyright (C) 2017 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-include build/make/target/board/treble_common.mk
diff --git a/target/board/treble_common_64.mk b/target/board/treble_common_64.mk
deleted file mode 100644
index 8980dfd..0000000
--- a/target/board/treble_common_64.mk
+++ /dev/null
@@ -1,20 +0,0 @@
-#
-# Copyright (C) 2017 The Android Open-Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-include build/make/target/board/treble_common.mk
-
-# Enable 64-bits binder
-TARGET_USES_64_BIT_BINDER := true
diff --git a/target/board/treble_system.prop b/target/board/treble_system.prop
deleted file mode 100644
index 0c04a95..0000000
--- a/target/board/treble_system.prop
+++ /dev/null
@@ -1,8 +0,0 @@
-# GSI always generate dex pre-opt in system image
-ro.cp_system_other_odex=0
-
-# GSI always disables adb authentication
-ro.adb.secure=0
-
-# TODO(b/78105955): disable privapp_permissions checking before the bug solved
-ro.control_privapp_permissions=disable
diff --git a/target/product/aosp_arm64_a.mk b/target/product/aosp_arm64_a.mk
index 3c7af33..b1c4b7d 100644
--- a/target/product/aosp_arm64_a.mk
+++ b/target/product/aosp_arm64_a.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 include build/make/target/product/treble_common_64.mk
 
diff --git a/target/product/aosp_arm64_ab.mk b/target/product/aosp_arm64_ab.mk
index d389c74..92f5055 100644
--- a/target/product/aosp_arm64_ab.mk
+++ b/target/product/aosp_arm64_ab.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 # aosp_arm64_ab-userdebug is a Legacy GSI for the devices with:
 # - ARM 64 bits user space
diff --git a/target/product/aosp_arm_a.mk b/target/product/aosp_arm_a.mk
index 3060fa9..d89a326 100644
--- a/target/product/aosp_arm_a.mk
+++ b/target/product/aosp_arm_a.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 include build/make/target/product/treble_common_32.mk
 
diff --git a/target/product/aosp_arm_ab.mk b/target/product/aosp_arm_ab.mk
index 5845d3b..b35e517 100644
--- a/target/product/aosp_arm_ab.mk
+++ b/target/product/aosp_arm_ab.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 # aosp_arm_ab-userdebug is a Legacy GSI for the devices with:
 # - ARM 32 bits user space
diff --git a/target/product/aosp_x86_64_a.mk b/target/product/aosp_x86_64_a.mk
index a7fb740..6b6785a 100644
--- a/target/product/aosp_x86_64_a.mk
+++ b/target/product/aosp_x86_64_a.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 include build/make/target/product/treble_common_64.mk
 
diff --git a/target/product/aosp_x86_64_ab.mk b/target/product/aosp_x86_64_ab.mk
index d9163d7..35bf61a 100644
--- a/target/product/aosp_x86_64_ab.mk
+++ b/target/product/aosp_x86_64_ab.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 # aosp_x86_64_ab-userdebug is a Legacy GSI for the devices with:
 # - x86 64 bits user space
diff --git a/target/product/aosp_x86_a.mk b/target/product/aosp_x86_a.mk
index 9ed2995..99ed7e4 100644
--- a/target/product/aosp_x86_a.mk
+++ b/target/product/aosp_x86_a.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 include build/make/target/product/treble_common_32.mk
 
diff --git a/target/product/aosp_x86_ab.mk b/target/product/aosp_x86_ab.mk
index 4fff3d1..185e2f0 100644
--- a/target/product/aosp_x86_ab.mk
+++ b/target/product/aosp_x86_ab.mk
@@ -17,7 +17,7 @@
 # PRODUCT_PROPERTY_OVERRIDES cannot be used here because sysprops will be at
 # /vendor/[build|default].prop when build split is on. In order to have sysprops
 # on the generic system image, place them in build/make/target/board/
-# treble_system.prop.
+# gsi_system.prop.
 
 # aosp_x86_ab-userdebug is a Legacy GSI for the devices with:
 # - x86 32 bits user space
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 392a580..63db564 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -16,6 +16,7 @@
 
 # Base modules and settings for the system partition.
 PRODUCT_PACKAGES += \
+    abb \
     adb \
     adbd \
     am \
@@ -61,6 +62,7 @@
     CtsShimPrivPrebuilt \
     debuggerd\
     DefaultContainerService \
+    dmctl \
     dnsmasq \
     DownloadProvider \
     dpm \
@@ -81,7 +83,6 @@
     heapprofd_client \
     gatekeeperd \
     gpuservice \
-    healthd \
     hid \
     hwservicemanager \
     idmap \
@@ -206,6 +207,7 @@
     MediaProvider \
     mediaserver \
     mke2fs \
+    ModuleMetadata \
     monkey \
     mtpd \
     ndc \
@@ -315,10 +317,7 @@
 # Packages included only for eng or userdebug builds, previously debug tagged
 PRODUCT_PACKAGES_DEBUG := \
     adb_keys \
-    apex.test.key \
     arping \
-    com.android.apex.test_package.key \
-    com.android.apex.test_package.preinstall.key \
     iotop \
     iw \
     logpersist.start \
diff --git a/target/product/base_vendor.mk b/target/product/base_vendor.mk
index 9bb45d1..1bb4bee 100644
--- a/target/product/base_vendor.mk
+++ b/target/product/base_vendor.mk
@@ -53,6 +53,10 @@
     vndservice \
     vndservicemanager \
 
+# Base modules and settings for the product partition.
+PRODUCT_PACKAGES += \
+    healthd \
+
 # VINTF data for vendor image
 PRODUCT_PACKAGES += \
     device_manifest.xml \
diff --git a/target/product/gsi/current.txt b/target/product/gsi/current.txt
index 0b99000..17d2f1b 100644
--- a/target/product/gsi/current.txt
+++ b/target/product/gsi/current.txt
@@ -118,7 +118,9 @@
 VNDK-core: android.hardware.neuralnetworks@1.2.so
 VNDK-core: android.hardware.nfc@1.0.so
 VNDK-core: android.hardware.nfc@1.1.so
+VNDK-core: android.hardware.nfc@1.2.so
 VNDK-core: android.hardware.oemlock@1.0.so
+VNDK-core: android.hardware.power.stats@1.0.so
 VNDK-core: android.hardware.power@1.0.so
 VNDK-core: android.hardware.power@1.1.so
 VNDK-core: android.hardware.power@1.2.so
diff --git a/target/product/handheld_system.mk b/target/product/handheld_system.mk
index f874868..acafe80 100644
--- a/target/product/handheld_system.mk
+++ b/target/product/handheld_system.mk
@@ -36,53 +36,34 @@
     Bluetooth \
     BluetoothMidiService \
     BookmarkProvider \
-    Browser2 \
     BuiltInPrintService \
-    Calendar \
     CalendarProvider \
-    Camera2 \
     cameraserver \
     CaptivePortalLogin \
     CertInstaller \
     clatd \
     clatd.conf \
-    Contacts \
-    DeskClock \
     DocumentsUI \
     DownloadProviderUi \
     EasterEgg \
-    Email \
     ExactCalculator \
     ExternalStorageProvider \
     FusedLocation \
-    Gallery2 \
-    Home \
     InputDevices \
     KeyChain \
-    LatinIME \
-    Launcher3QuickStep \
     librs_jni \
     ManagedProvisioning \
     MmsService \
     MtpDocumentsProvider \
-    Music \
     MusicFX \
     NfcNci \
-    OneTimeInitializer \
     PacProcessor \
-    PrintRecommendationService \
     PrintSpooler \
-    Provision \
     ProxyHandler \
-    QuickSearchBox \
     screenrecord \
     SecureElement \
-    Settings \
-    SettingsIntelligence \
     SharedStorageBackup \
     SimAppDialog \
-    StorageManager \
-    SystemUI \
     Telecom \
     TelephonyProvider \
     TeleService \
@@ -90,7 +71,6 @@
     UserDictionaryProvider \
     VpnDialogs \
     vr \
-    WallpaperCropper \
 
 
 PRODUCT_SYSTEM_SERVER_APPS += \
diff --git a/target/product/handheld_vendor.mk b/target/product/handheld_vendor.mk
index 0f73875..b9970e9 100644
--- a/target/product/handheld_vendor.mk
+++ b/target/product/handheld_vendor.mk
@@ -19,6 +19,8 @@
 # it definitely doesn't belong on other types of devices (if it
 # does, use base_vendor.mk).
 $(call inherit-product, $(SRC_TARGET_DIR)/product/media_vendor.mk)
+
+# /vendor packages
 PRODUCT_PACKAGES += \
     audio.primary.default \
     DisplayCutoutEmulationCornerOverlay \
@@ -28,3 +30,25 @@
     power.default \
     SysuiDarkThemeOverlay \
     vibrator.default \
+
+# /product packages
+PRODUCT_PACKAGES += \
+    Browser2 \
+    Calendar \
+    Camera2 \
+    Contacts \
+    DeskClock \
+    Email \
+    Gallery2 \
+    LatinIME \
+    Launcher3QuickStep \
+    Music \
+    OneTimeInitializer \
+    PrintRecommendationService \
+    Provision \
+    QuickSearchBox \
+    Settings \
+    SettingsIntelligence \
+    StorageManager \
+    SystemUI \
+    WallpaperCropper \
diff --git a/target/product/languages_default.mk b/target/product/languages_default.mk
new file mode 100644
index 0000000..a13a23c
--- /dev/null
+++ b/target/product/languages_default.mk
@@ -0,0 +1,105 @@
+#
+# Copyright (C) 2009 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# This is a build configuration that just contains a list of languages, with
+# en_US set as the default language.
+PRODUCT_LOCALES := \
+        en_US \
+        af_ZA \
+        am_ET \
+        ar_EG \
+        ar_XB \
+        as_IN \
+        az_AZ \
+        be_BY \
+        bg_BG \
+        bn_BD \
+        bs_BA \
+        ca_ES \
+        cs_CZ \
+        da_DK \
+        de_DE \
+        el_GR \
+        en_AU \
+        en_CA \
+        en_GB \
+        en_IN \
+        en_XA \
+        es_ES \
+        es_US \
+        et_EE \
+        eu_ES \
+        fa_IR \
+        fi_FI \
+        fr_CA \
+        fr_FR \
+        gl_ES \
+        gu_IN \
+        hi_IN \
+        hr_HR \
+        hu_HU \
+        hy_AM \
+        in_ID \
+        is_IS \
+        it_IT \
+        iw_IL \
+        ja_JP \
+        ka_GE \
+        kk_KZ \
+        km_KH \
+        kn_IN \
+        ko_KR \
+        ky_KG \
+        lo_LA \
+        lt_LT \
+        lv_LV \
+        mk_MK \
+        ml_IN \
+        mn_MN \
+        mr_IN \
+        ms_MY \
+        my_MM \
+        nb_NO \
+        ne_NP \
+        nl_NL \
+        or_IN \
+        pa_IN \
+        pl_PL \
+        pt_BR \
+        pt_PT \
+        ro_RO \
+        ru_RU \
+        si_LK \
+        sk_SK \
+        sl_SI \
+        sq_AL \
+        sr_Latn_RS \
+        sr_RS \
+        sv_SE \
+        sw_TZ \
+        ta_IN \
+        te_IN \
+        th_TH \
+        tl_PH \
+        tr_TR \
+        uk_UA \
+        ur_PK \
+        uz_UZ \
+        vi_VN \
+        zh_CN \
+        zh_HK \
+        zh_TW \
+        zu_ZA \
diff --git a/target/product/languages_full.mk b/target/product/languages_full.mk
index 5f3795f..43a40a7 100644
--- a/target/product/languages_full.mk
+++ b/target/product/languages_full.mk
@@ -14,94 +14,9 @@
 # limitations under the License.
 #
 
-# This is a build configuration that just contains a list of languages.
-#
-# These are all the locales that have translations.
-PRODUCT_LOCALES := \
-        en_US \
-        af_ZA \
-        am_ET \
-        ar_EG \
-        ar_XB \
-        as_IN \
-        az_AZ \
-        be_BY \
-        bg_BG \
-        bn_BD \
-        bs_BA \
-        ca_ES \
-        cs_CZ \
-        da_DK \
-        de_DE \
-        el_GR \
-        en_AU \
-        en_CA \
-        en_GB \
-        en_IN \
-        en_XA \
-        en_XC \
-        es_ES \
-        es_US \
-        et_EE \
-        eu_ES \
-        fa_IR \
-        fi_FI \
-        fr_CA \
-        fr_FR \
-        gl_ES \
-        gu_IN \
-        hi_IN \
-        hr_HR \
-        hu_HU \
-        hy_AM \
-        in_ID \
-        is_IS \
-        it_IT \
-        iw_IL \
-        ja_JP \
-        ka_GE \
-        kk_KZ \
-        km_KH \
-        kn_IN \
-        ko_KR \
-        ky_KG \
-        lo_LA \
-        lt_LT \
-        lv_LV \
-        mk_MK \
-        ml_IN \
-        mn_MN \
-        mr_IN \
-        ms_MY \
-        my_MM \
-        nb_NO \
-        ne_NP \
-        nl_NL \
-        or_IN \
-        pa_IN \
-        pl_PL \
-        pt_BR \
-        pt_PT \
-        ro_RO \
-        ru_RU \
-        si_LK \
-        sk_SK \
-        sl_SI \
-        sq_AL \
-        sr_Latn_RS \
-        sr_RS \
-        sv_SE \
-        sw_TZ \
-        ta_IN \
-        te_IN \
-        th_TH \
-        tl_PH \
-        tr_TR \
-        uk_UA \
-        ur_PK \
-        uz_UZ \
-        vi_VN \
-        zh_CN \
-        zh_HK \
-        zh_TW \
-        zu_ZA
+# This is a build configuration that contains the default list of languages,
+# as well as the en_XC pseudo-locale, which is useful for localization test
+# builds.
+
+$(call inherit-product, $(SRC_TARGET_DIR)/product/languages_default.mk)
+PRODUCT_LOCALES += en_XC
diff --git a/target/product/languages_small.mk b/target/product/languages_small.mk
deleted file mode 100644
index d695ca8..0000000
--- a/target/product/languages_small.mk
+++ /dev/null
@@ -1,24 +0,0 @@
-#
-# Copyright (C) 2009 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# This is a build configuration that just contains a list of languages.
-# It helps in situations where laugnages must come first in the list,
-# mostly because screen densities interfere with the list of locales and
-# the system misbehaves when a density is the first locale.
-
-# This is the list of languages that originally shipped on ADP1
-
-PRODUCT_LOCALES := en_US en_GB fr_FR it_IT de_DE es_ES
diff --git a/target/product/mainline.mk b/target/product/mainline.mk
new file mode 100644
index 0000000..44dcd60
--- /dev/null
+++ b/target/product/mainline.mk
@@ -0,0 +1,21 @@
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Makefile including the mainline system image, and the relevant AOSP portions
+# for the other partitions.
+$(call inherit-product, $(SRC_TARGET_DIR)/product/mainline_system.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/handheld_vendor.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/telephony_vendor.mk)
diff --git a/target/product/mainline_arm64.mk b/target/product/mainline_arm64.mk
index f93d7e4..6122ac1 100644
--- a/target/product/mainline_arm64.mk
+++ b/target/product/mainline_arm64.mk
@@ -15,9 +15,7 @@
 #
 
 $(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
-$(call inherit-product, $(SRC_TARGET_DIR)/product/mainline_system.mk)
-$(call inherit-product, $(SRC_TARGET_DIR)/product/handheld_vendor.mk)
-$(call inherit-product, $(SRC_TARGET_DIR)/product/telephony_vendor.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/mainline.mk)
 
 PRODUCT_NAME := mainline_arm64
 PRODUCT_DEVICE := generic_arm64
@@ -32,3 +30,40 @@
   root/init.zygote64_32.rc \
   system/etc/seccomp_policy/crash_dump.arm.policy \
   system/etc/seccomp_policy/mediacodec.policy \
+
+# Modules that are to be moved to /product
+PRODUCT_ARTIFACT_PATH_REQUIREMENT_WHITELIST += \
+  system/app/Browser2/Browser2.apk \
+  system/app/Calendar/Calendar.apk \
+  system/app/Camera2/Camera2.apk \
+  system/app/DeskClock/DeskClock.apk \
+  system/app/Email/Email.apk \
+  system/app/Gallery2/Gallery2.apk \
+  system/app/LatinIME/LatinIME.apk \
+  system/app/LatinIME/oat/arm64/LatinIME.odex \
+  system/app/LatinIME/oat/arm64/LatinIME.vdex \
+  system/app/Music/Music.apk \
+  system/app/PrintRecommendationService/PrintRecommendationService.apk \
+  system/app/QuickSearchBox/QuickSearchBox.apk \
+  system/bin/healthd \
+  system/etc/init/healthd.rc \
+  system/etc/vintf/manifest/manifest_healthd.xml \
+  system/lib64/libjni_eglfence.so \
+  system/lib64/libjni_filtershow_filters.so \
+  system/lib64/libjni_jpegstream.so \
+  system/lib64/libjni_jpegutil.so \
+  system/lib64/libjni_latinime.so \
+  system/lib64/libjni_tinyplanet.so \
+  system/priv-app/CarrierConfig/CarrierConfig.apk \
+  system/priv-app/Contacts/Contacts.apk \
+  system/priv-app/Dialer/Dialer.apk \
+  system/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk \
+  system/priv-app/OneTimeInitializer/OneTimeInitializer.apk \
+  system/priv-app/Provision/Provision.apk \
+  system/priv-app/Settings/Settings.apk \
+  system/priv-app/SettingsIntelligence/SettingsIntelligence.apk \
+  system/priv-app/StorageManager/StorageManager.apk \
+  system/priv-app/SystemUI/SystemUI.apk \
+  system/priv-app/SystemUI/oat/arm64/SystemUI.odex \
+  system/priv-app/SystemUI/oat/arm64/SystemUI.vdex \
+  system/priv-app/WallpaperCropper/WallpaperCropper.apk \
diff --git a/target/product/mainline_system.mk b/target/product/mainline_system.mk
index c41e1d7..b9b422f 100644
--- a/target/product/mainline_system.mk
+++ b/target/product/mainline_system.mk
@@ -17,6 +17,9 @@
 # This makefile is the basis of a generic system image for a handheld device.
 $(call inherit-product, $(SRC_TARGET_DIR)/product/handheld_system.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/product/telephony_system.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/languages_default.mk)
+# Add adb keys to debuggable AOSP builds (if they exist)
+$(call inherit-product-if-exists, vendor/google/security/adb/vendor_key.mk)
 
 # Shared java libs
 PRODUCT_PACKAGES += \
@@ -31,6 +34,7 @@
     RcsService \
     SafetyRegulatoryInfo \
     Stk \
+    Tag \
     TimeZoneUpdater \
 
 # Binaries
@@ -71,6 +75,7 @@
     android.hardware.radio.deprecated@1.0 \
     android.hardware.secure_element@1.0 \
     android.hardware.tests.libhwbinder@1.0-impl \
+    android.hardware.wifi@1.0 \
     android.hidl.base@1.0 \
     libaudio-resampler \
     liblogwrap \
@@ -97,8 +102,6 @@
 # Enable dynamic partition size
 PRODUCT_USE_DYNAMIC_PARTITION_SIZE := true
 
-PRODUCT_LOCALES := en_US af_ZA am_ET ar_EG as_IN az_AZ be_BY bg_BG bn_BD bs_BA ca_ES cs_CZ da_DK de_DE el_GR en_AU en_CA en_GB en_IN es_ES es_US et_EE eu_ES fa_IR fi_FI fr_CA fr_FR gl_ES gu_IN hi_IN hr_HR hu_HU hy_AM in_ID is_IS it_IT iw_IL ja_JP ka_GE kk_KZ km_KH ko_KR ky_KG lo_LA lt_LT lv_LV km_MH kn_IN mn_MN ml_IN mk_MK mr_IN ms_MY my_MM ne_NP nb_NO nl_NL or_IN pa_IN pl_PL pt_BR pt_PT ro_RO ru_RU si_LK sk_SK sl_SI sq_AL sr_Latn_RS sr_RS sv_SE sw_TZ ta_IN te_IN th_TH tl_PH tr_TR uk_UA ur_PK uz_UZ vi_VN zh_CN zh_HK zh_TW zu_ZA en_XA ar_XB
-
 PRODUCT_NAME := mainline_system
 PRODUCT_BRAND := generic
 
diff --git a/target/product/media_vendor.mk b/target/product/media_vendor.mk
index 1db0b58..f30e6f3 100644
--- a/target/product/media_vendor.mk
+++ b/target/product/media_vendor.mk
@@ -20,6 +20,11 @@
 # base_vendor.mk.
 $(call inherit-product, $(SRC_TARGET_DIR)/product/base_vendor.mk)
 
+# /vendor packages
 PRODUCT_PACKAGES += \
     libaudiopreprocessing \
     libwebrtc_audio_preprocessing \
+
+# /product packages
+PRODUCT_PACKAGES += \
+    webview \
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index 6d835fd..71834aa 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -100,4 +100,5 @@
 
 # Enable minidebuginfo generation unless overridden.
 PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
+    dalvik.vm.minidebuginfo=true \
     dalvik.vm.dex2oat-minidebuginfo=true
diff --git a/target/product/telephony_system.mk b/target/product/telephony_system.mk
index 0b1e8a2..e30f036 100644
--- a/target/product/telephony_system.mk
+++ b/target/product/telephony_system.mk
@@ -19,9 +19,7 @@
 
 PRODUCT_PACKAGES := \
     ANS \
-    CarrierConfig \
     CarrierDefaultApp \
-    Dialer \
     CallLogBackup \
     CellBroadcastReceiver \
     EmergencyInfo \
diff --git a/target/product/telephony_vendor.mk b/target/product/telephony_vendor.mk
index bddd383..4cff16d 100644
--- a/target/product/telephony_vendor.mk
+++ b/target/product/telephony_vendor.mk
@@ -17,7 +17,13 @@
 # This is the list of modules that are specific to products that have telephony
 # hardware, and install outside the system partition.
 
+# /vendor packages
 PRODUCT_PACKAGES := \
     rild \
 
+# /product packages
+PRODUCT_PACKAGES += \
+    CarrierConfig \
+    Dialer \
+
 PRODUCT_COPY_FILES := \
diff --git a/target/product/treble_common.mk b/target/product/treble_common.mk
index 0408028..7642876 100644
--- a/target/product/treble_common.mk
+++ b/target/product/treble_common.mk
@@ -38,7 +38,7 @@
 # Telephony:
 #   Provide a default APN configuration
 PRODUCT_COPY_FILES += \
-    device/generic/goldfish/data/etc/apns-conf.xml:system/etc/apns-conf.xml
+    device/sample/etc/apns-full-conf.xml:system/etc/apns-conf.xml
 
 # NFC:
 #   Provide default libnfc-nci.conf file for devices that does not have one in
diff --git a/tools/Android.mk b/tools/Android.mk
deleted file mode 100644
index c05d681..0000000
--- a/tools/Android.mk
+++ /dev/null
@@ -1,23 +0,0 @@
-#
-# Copyright (C) 2010 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-LOCAL_PATH := $(call my-dir)
-
-# Only if this Android.mk was included not by a symlink should it be used.
-# This facilitates the transition away from symlinks: b/64397960
-ifeq ($(LOCAL_PATH),build/make/tools)
-include $(call all-makefiles-under,$(LOCAL_PATH))
-endif
diff --git a/tools/droiddoc/Android.mk b/tools/droiddoc/Android.mk
deleted file mode 100644
index ff08edc..0000000
--- a/tools/droiddoc/Android.mk
+++ /dev/null
@@ -1,17 +0,0 @@
-# Copyright (C) 2008 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-LOCAL_PATH := $(call my-dir)
-
-# Droiddoc is now Doclava -- See external/doclava.
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index 1872a58..da5ea4a 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -859,11 +859,12 @@
     banner("vbmeta")
     AddVBMeta(output_zip, partitions, "vbmeta", vbmeta_partitions)
 
-  if OPTIONS.info_dict.get("build_super_partition"):
+  if OPTIONS.info_dict.get("build_super_partition") == "true":
     banner("super_empty")
     AddSuperEmpty(output_zip)
 
-    if OPTIONS.info_dict.get("dynamic_partition_retrofit") == "true":
+    if OPTIONS.info_dict.get(
+        "build_retrofit_dynamic_partitions_ota_package") == "true":
       banner("super split images")
       AddSuperSplit(output_zip)
 
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 146b868..d710603 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -75,8 +75,8 @@
   """
   cmd = ["find", path, "-print"]
   output = common.RunAndCheckOutput(cmd, verbose=False)
-  # increase by 25 % as number of files and directories is not whole picture.
-  return output.count('\n') * 30 // 24
+  # TODO(b/122328872) Fix estimation algorithm to not need the multiplier.
+  return output.count('\n') * 2
 
 
 def GetFilesystemCharacteristics(sparse_image_path):
diff --git a/tools/releasetools/build_super_image.py b/tools/releasetools/build_super_image.py
index e8730ae..bb0e641 100755
--- a/tools/releasetools/build_super_image.py
+++ b/tools/releasetools/build_super_image.py
@@ -67,6 +67,17 @@
     return os.path.getsize(img)
 
 
+def GetArgumentsForImage(partition, group, image=None):
+  image_size = GetPartitionSizeFromImage(image) if image else 0
+
+  cmd = ["--partition",
+         "{}:readonly:{}:{}".format(partition, image_size, group)]
+  if image:
+    cmd += ["--image", "{}={}".format(partition, image)]
+
+  return cmd
+
+
 def BuildSuperImageFromDict(info_dict, output):
 
   cmd = [info_dict["lpmake"],
@@ -105,26 +116,25 @@
 
     for partition in partition_list:
       image = info_dict.get("{}_image".format(partition))
-      image_size = 0
       if image:
-        image_size = GetPartitionSizeFromImage(image)
         has_image = True
-      if append_suffix:
-        cmd += ["--partition",
-                "{}_a:readonly:{}:{}_a".format(partition, image_size, group),
-                "--partition",
-                "{}_b:readonly:0:{}_b".format(partition, group)]
-        if image:
-          # For A/B devices, super partition always contains sub-partitions in
-          # the _a slot, because this image should only be used for
-          # bootstrapping / initializing the device. When flashing the image,
-          # bootloader fastboot should always mark _a slot as bootable.
-          cmd += ["--image", "{}_a={}".format(partition, image)]
-      else:
-        cmd += ["--partition",
-                "{}:readonly:{}:{}".format(partition, image_size, group)]
-        if image:
-          cmd += ["--image", "{}={}".format(partition, image)]
+
+      if not append_suffix:
+        cmd += GetArgumentsForImage(partition, group, image)
+        continue
+
+      # For A/B devices, super partition always contains sub-partitions in
+      # the _a slot, because this image should only be used for
+      # bootstrapping / initializing the device. When flashing the image,
+      # bootloader fastboot should always mark _a slot as bootable.
+      cmd += GetArgumentsForImage(partition + "_a", group + "_a", image)
+
+      other_image = None
+      if partition == "system" and "system_other_image" in info_dict:
+        other_image = info_dict["system_other_image"]
+        has_image = True
+
+      cmd += GetArgumentsForImage(partition + "_b", group + "_b", other_image)
 
   if has_image:
     cmd.append("--sparse")
@@ -145,6 +155,12 @@
   info_dict = common.LoadInfoDict(inp)
   partition_list = shlex.split(
       info_dict.get("dynamic_partition_list", "").strip())
+
+  if "system" in partition_list:
+    image_path = os.path.join(inp, "IMAGES", "system_other.img")
+    if os.path.isfile(image_path):
+      info_dict["system_other_image"] = image_path
+
   missing_images = []
   for partition in partition_list:
     image_path = os.path.join(inp, "IMAGES", "{}.img".format(partition))
diff --git a/tools/signapk/Android.bp b/tools/signapk/Android.bp
index e95205d..ad9d957 100644
--- a/tools/signapk/Android.bp
+++ b/tools/signapk/Android.bp
@@ -28,4 +28,10 @@
     ],
 
     required: ["libconscrypt_openjdk_jni"],
+
+    // The post-build signing tools need signapk.jar (and its shared libraries,
+    // handled in their own Android.bp files)
+    dist: {
+        targets: ["droidcore"],
+    },
 }
diff --git a/tools/signapk/Android.mk b/tools/signapk/Android.mk
deleted file mode 100644
index ff54d6d..0000000
--- a/tools/signapk/Android.mk
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-# Copyright (C) 2008 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-LOCAL_PATH := $(call my-dir)
-
-ifeq ($(TARGET_BUILD_APPS),)
-# The post-build signing tools need signapk.jar and its shared libraries,
-# but we don't need this if we're just doing unbundled apps.
-my_dist_files := $(HOST_OUT_JAVA_LIBRARIES)/signapk.jar \
-    $(HOST_OUT_SHARED_LIBRARIES)/libconscrypt_openjdk_jni$(HOST_SHLIB_SUFFIX)
-
-$(call dist-for-goals,droidcore,$(my_dist_files))
-my_dist_files :=
-endif