Fix for setting Toolbar content descriptions
Fix for setting Toolbar content descriptions

Allow resid 0 as a null content description.

Change-Id: I0663feac229a77d5efffece2bd686de4ee99d840

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