Correctly save Activity's state in saveInstanceState
Correctly save Activity's state in saveInstanceState

Prior to this change, saveInstanceState would
call directly to Activity.onSaveInstanceState(),
rather than performSaveInstanceState().
This meant that saveManagdDialogs() was not called,
so Activities running under a LocalActivityManager
do not get their dialogs restored on configuration changes.

Change-Id: Id45110a8716a86958c14f4b1ea5a84c9cdf107f1

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