Transition support library

This new library currently supports some basic features of Transition
API.  Scene, Fade, ChangeBounds, TransitionSet, AutoTransition and
TransitionManager have been back-ported except for XML.

Change-Id: I75e9e4d6d7f366297f69735adec0842784290329
diff --git a/transition/Android.mk b/transition/Android.mk
new file mode 100644
index 0000000..ad31fee
--- /dev/null
+++ b/transition/Android.mk
@@ -0,0 +1,90 @@
+# Copyright (C) 2016 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)
+
+# Build the resources using the latest applicable SDK version.
+# We do this here because the final static library must be compiled with an older
+# SDK version than the resources.  The resources library and the R class that it
+# contains will not be linked into the final static library.
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-transition-res
+LOCAL_SDK_VERSION := $(SUPPORT_CURRENT_SDK_VERSION)
+LOCAL_SRC_FILES := $(call all-java-files-under, dummy)
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
+LOCAL_JAR_EXCLUDE_FILES := none
+LOCAL_JAVA_LANGUAGE_VERSION := 1.7
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+support_module_src_files := $(LOCAL_SRC_FILES)
+
+# A helper sub-library to resolve cyclic dependencies between Transition and platform dependent
+# implementations
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-transition-base
+LOCAL_SDK_VERSION := 14
+LOCAL_SRC_FILES := $(call all-java-files-under, base)
+LOCAL_JAVA_LANGUAGE_VERSION := 1.7
+LOCAL_JAVA_LIBRARIES := android-support-transition-res \
+    android-support-v4
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+support_module_src_files += $(LOCAL_SRC_FILES)
+
+# A helper sub-library that makes direct use of Ice Cream Sandwich APIs
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-transition-ics
+LOCAL_SDK_VERSION := 14
+LOCAL_SRC_FILES := $(call all-java-files-under, ics)
+LOCAL_STATIC_JAVA_LIBRARIES := android-support-transition-base
+LOCAL_JAVA_LIBRARIES := android-support-transition-res \
+    android-support-v4
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+support_module_src_files += $(LOCAL_SRC_FILES)
+
+# A helper sub-library that makes direct use of KitKat APIs
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-transition-kitkat
+LOCAL_SDK_VERSION := 19
+LOCAL_SRC_FILES := $(call all-java-files-under, kitkat)
+LOCAL_STATIC_JAVA_LIBRARIES := android-support-transition-ics
+LOCAL_JAVA_LIBRARIES := android-support-transition-res \
+    android-support-v4
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+support_module_src_files += $(LOCAL_SRC_FILES)
+
+# Here is the final static library that apps can link against.
+# The R class is automatically excluded from the generated library.
+# Applications that use this library must specify LOCAL_RESOURCE_DIR
+# in their makefiles to include the resources in their package.
+include $(CLEAR_VARS)
+LOCAL_MODULE := android-support-transition
+LOCAL_SDK_VERSION := $(SUPPORT_CURRENT_SDK_VERSION)
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_STATIC_JAVA_LIBRARIES := android-support-transition-kitkat
+LOCAL_JAVA_LIBRARIES := android-support-transition-res \
+    android-support-v4
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+support_module_src_files += $(LOCAL_SRC_FILES)
+
+# API Check
+# ---------------------------------------------
+support_module := $(LOCAL_MODULE)
+support_module_api_dir := $(LOCAL_PATH)/api
+support_module_java_libraries := $(LOCAL_JAVA_LIBRARIES)
+support_module_java_packages := android.support.transition
+include $(SUPPORT_API_CHECK)