Avoid invalid shader creation for certain blend modes
Avoid invalid shader creation for certain blend modes

bug:19627342

Change-Id: I41e3c1ce8e6fa52f046ec492d19de7cab92b9ec5

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