Move private_manifest file insertion to jars merging phase.

By doing this, the change of private_manifest file won't trigger
Javac to re-run during re-build.

Bug: b/65455145
Test: m clean && m -j32
Change-Id: Ib90d56daf0be5f31b51e07b7714a933bc5cf4496
diff --git a/core/java.mk b/core/java.mk
index 1e63d48..f661f06 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -476,7 +476,6 @@
     $(java_source_list_file) \
     $(java_sources_deps) \
     $(full_java_header_libs) \
-    $(jar_manifest_file) \
     $(layers_file) \
     $(annotation_processor_deps) \
     $(NORMALIZE_PATH) \
@@ -490,8 +489,6 @@
     $(java_source_list_file) \
     $(java_sources_deps) \
     $(full_java_header_libs) \
-    $(jar_manifest_file) \
-    $(layers_file) \
     $(NORMALIZE_PATH) \
     $(JAR_ARGS) \
     $(ZIPTIME) \
@@ -518,10 +515,13 @@
 
 $(full_classes_combined_jar): PRIVATE_DONT_DELETE_JAR_META_INF := $(LOCAL_DONT_DELETE_JAR_META_INF)
 $(full_classes_combined_jar): $(full_classes_compiled_jar) \
+                              $(jar_manifest_file) \
                               $(full_static_java_libs) | $(MERGE_ZIPS)
-	$(MERGE_ZIPS) -j \
-        $(if $(PRIVATE_DONT_DELETE_JAR_META_INF),,-stripDir META-INF -zipToNotStrip $<) \
-        $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
+	$(if $(PRIVATE_JAR_MANIFEST), $(hide) sed -e "s/%BUILD_NUMBER%/$(BUILD_NUMBER_FROM_FILE)/" \
+            $(PRIVATE_JAR_MANIFEST) > $(dir $@)/manifest.mf)
+	$(MERGE_ZIPS) -j $(if $(PRIVATE_JAR_MANIFEST),-m $(dir $@)/manifest.mf) \
+            $(if $(PRIVATE_DONT_DELETE_JAR_META_INF),,-stripDir META-INF -zipToNotStrip $<) \
+            $@ $< $(call reverse-list,$(PRIVATE_STATIC_JAVA_LIBRARIES))
 
 ifdef LOCAL_JAR_PROCESSOR
 # LOCAL_JAR_PROCESSOR_ARGS must be evaluated here to set up the rule-local