Improve javadoc for PRESENTATION_ constants.
Improve javadoc for PRESENTATION_ constants.

Bug: 21089678
Change-Id: I045fd71a30c75c213dd5c0c64ded983ea5e5d866

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