Adding Any Appllication in Android Source.txt

===============================================================================
		For Adding Any Appllication in Android Source
===============================================================================

For : TestApp

Create TestApp directory into below path 
vendor/<vendor>/proprietary/prebuilt/target/product/<device>/system/app/

cd vendor/<vendor>/proprietary/prebuilt/target/product/<device>/system/app/
mkdir TestApp

copy APK file of  application with name TestApp.apk into 
vendor/<vendor>/proprietary/prebuilt/target/product/<device>/system/app/TestApp/


add following changes into vendor/<vendor>/proprietary/prebuilt/target/product/<device>/Android.mk

#TestApp apk
include $(CLEAR_VARS)
LOCAL_MODULE        := TestApp
LOCAL_MODULE_OWNER  := xyz
LOCAL_MODULE_TAGS   := optional debug
LOCAL_MODULE_CLASS  := APPS
LOCAL_CERTIFICATE   := platform
LOCAL_MODULE_SUFFIX := .apk
LOCAL_SRC_FILES     := ../../.././target/product/<device>/system/app/TestApp/TestApp.apk
LOCAL_MODULE_PATH   := $(PRODUCT_OUT)/system/app
include $(BUILD_PREBUILT)

now, build android.