Update BiDiTest app for Gravity renaming
Update BiDiTest app for Gravity renaming

- BEFORE?AFTER is now START/END

Change-Id: I44cfdc17090052704024d8c5386553f0c83e9ab2

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