Make background color pure black.
Make background color pure black.

Change-Id: Iedd1da42448bf295b87284d24a030430f4f8e3fe

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