1) Add OneHandedEventCallback for WMShell to register
callback, and if one handed mode settings set show
notifications, when user tap one handed mode shortcut
notify WMShell send KEYCODE_SYSTEM_NAVIGATION_DOWN
through OneHandedEventCallback with SysUIMainExecutor.
2) Add isReady() flag in OneHandedDisplayAreaOrganizer
and Simplify the flow of onActivatedActionChanged()
to prevent potential race problem while auto-enable
One-handed and immeditately startOneHanded(), however,
DisplayAreaOrganizer#onDisplayAreaAppeared() may not
ready for transtion yet, and result mState keep in
unfinsihed STATE_ENTERING.
3) Adjust the transiton duration from 800ms to 600ms
800ms is a little bit long to affect timing of
apply runtime overlay package.
4) DelayExecute setEnabledGesturalOverlay() until
transition finised and at most delay once.
- onSwipeToNotificationEnabledChanged() : DelayExecute
- onEnabledSettingChanged() : DelayExecute
- Ctor setupGesturalOverlay() : No DelayExecute
- mState.isTransitioning() : DelayExecute
Test: WMShellUnitTests
Bug: 182425480
Change-Id: I2615c3b30ad95a858510b4bcc73d8f343843fc96
ca75e7e466