Revert "Compose gesture integrated fully into Launcher"

Revert "Compose gesture integrated fully into Nexus Launcher"

Revert submission 11035205-compose_gesture_fully_integrated_launcher

Reason for revert: Broke Launcher Android Studio build, quick switch, and home gesture doesn't work if Compose is open.
Reverted Changes:
I2d97b22d5:OverscrollPlugin refactored to use onTouchEvent
Ia19a55f65:Compose gesture integrated fully into Nexus Launch...
I65aa07ac1:Compose gesture integrated fully into Launcher

Change-Id: Ic05c47eb686b3942ba519e76db32977fc568844b