Revert "SwipeBackLayout: squash update from official"

This reverts commit c28b960af44dba5165fa82ba97d268acb1318f92.
Revert "SwipeBackLayout: disable translucent on launcher activities"

This reverts commit db2c0296d4fa88a4dea336ea235fcc680f1d65f7.
Revert "Activity: Init Global Swipe Back Gesture(1/2)"

This reverts commit 2f91316fdcaafb3e17f869db21c5ec46e0c58bb4.

Conflicts:
	core/res/res/values/symbols.xml

Change-Id: I7f3738e2ef189a52485e910ef1521ffcf943defb