Cancel the recents animation when keyguard is occluding.[1/2]

User can enter recents animation while a showWhenLocked activity on top
of keyguard by touch down navigation bar. In legacy, Launcher start the
recents animation by keep the original top activity on top. But for
shell transition, Launcher will start home activity with transient
launch flag. When core receive start activity request, unlike
startRecentsAnimation, core will try to move the activity to top, which
break the keyguard occluding state, so the keyguard will pop up on
screen before dismiss recents animation, and there is not have enough
information for shell know whether to hide the surface of the original
top activity.
To make the occluding state unchange during start transient launch, we
do not resume the launcher activity, also we do not move it to top. So
what we need to do is to collect the surfaces from launcher + top
occluding task + wallpaper and send this transition to shell.
Another change is Launcher will finish recents animation by calling the
RecentsAnimationController directly without start home activity. By
determine the top activity when set restoreTransientOrder, there will
update the hierarchy, which may change the occluding state and decide
whether to play unoccluding animation.

Bug: 230582311
Test: monitor no strange animation when running atest KeyguardTests
Test: enable shell transition. Start showWhenLocked activity while
keyguard showing. Scroll up to dismiss the activity and verify the
activity and home shall be stopped and only keyguard remains on the
screen.
Also verify entering recents works fine when device is unlocked.

Change-Id: Ia16fa01fdc09547cfb3ae1370875ac70f07ede8d