feat(MultiFingerMultiTap): Implement two finger triple tap feature on...

feat(MultiFingerMultiTap): Implement two finger triple tap feature on FullScreenMagnificationGestureHandler

NO_IFTTT=add the multi-finger multi-tap feature without syncing to the old state

Bug: 297805269
Test: manual
Test: adb shell device_config put accessibility com.android.server.accessibility.enable_magnification_multiple_finger_multiple_tap_gesture true
adb shell stop && adb shell start
atest FullScreenMagnificationGestureHandlerTest

Change-Id: Ib2ed22edf47673aa43eab758aaebe69f2020c349