Improve Display javadoc slightly
Improve Display javadoc slightly

Change-Id: Iaa7d599e11d42d4aaf50e87b141f9b8d04ba445e

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