Bump PLATFORM_PREVIEW_SDK_VERSION to 2
Bump PLATFORM_PREVIEW_SDK_VERSION to 2

Change-Id: I6633e0077a6a89ef737d7c4b686aab033d94c41b

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build