Doc change: small refinement of brand usage guidelines.
Doc change: small refinement of brand usage guidelines.

Change-Id: I3e7513ee6b5cc0dd0204ca5b78c9fd13e4c8cf4a

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