Fix touchexploration multi-finger gesture conflict
WindowMagnificationGestureHandler has higher priority to address
motion events. When the user put two fingers down on the screen,
magnification gesture detector will intercept all motion events.
It ends up the user couldn't perform any multi-finger gestures.
To fix it, we make magnification gesture detection more accurate:
1. swiping gesture sucesses only with one finger.
2. Regarding two-finger gesture, only swipe or stay on the screen
over a duration will be recognized.
Bug: 163016948
Test: manually test: enable Talback and perform 3-finger swipe gesture
atest com.android.server.accessibility.magnification
Change-Id: I310cf6e3fb2cb2b5b6fbc6a0ba9f0aa1d219b4df
(cherry picked from commit cb49d47bc6c30fb6c58fb3e7d077252fdd9641c1)
Merged-In: I310cf6e3fb2cb2b5b6fbc6a0ba9f0aa1d219b4df
13 files changed