Add new sample code for writing a ViewGroup.
Add new sample code for writing a ViewGroup.

Change-Id: Id6714b062884c9ed60703e5c199f16683c00a800

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base