Switch RS support lib to use LOCAL_SDK_VERSION.

The RS support lib wasn't setting LOCAL_SDK_VERSION, which caused
problems where hidden specialized system methods would be used on
devices without said methods.

bug 17189604

Change-Id: Iea51308625fe19c03e3302e3106e1a7c3e1cbc25
Merge "Switch RS support lib to use LOCAL_SDK_VERSION."