device/sample: Enhanced example to include usage of exposing APIs

Change-Id: Id0c0b2201ecb3d087ec1ae48b6629ee4f403dbfb

products/addon_stub_defs

++com.example.android.platform_library.*

products/sample_addon.mk

@@ -27,6 +27,9 @@ PRODUCT_SDK_ADDON_COPY_FILES := \
 PRODUCT_SDK_ADDON_COPY_MODULES := \
     com.example.android.platform_library:libs/platform_library.jar
 
+# Rules for public APIs
+PRODUCT_SDK_ADDON_STUB_DEFS := $(LOCAL_PATH)/addon_stub_defs
+
 # Name of the doc to generate and put in the add-on. This must match the name defined
 # in the optional library with the tag
 #    LOCAL_MODULE:= platform_library

sdk_addon/manifest.ini

@@ -13,7 +13,7 @@ vendor=Android Open Source Project
 description=sample add-on
 
 # version of the Android platform on which this add-on is built.
-api=3
+api=15
 
 # revision of the add-on. This must be a strict integer.
 revision=1