Fleshed up SuggestionSpan documentation. Bug 4553472
Fleshed up SuggestionSpan documentation. Bug 4553472

Change-Id: I3b5be9a6da79398b03d98eb33eb61a55fd702960

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