framework: port IME selector notification toggle (2/2)

Change-Id: Ia35960d88468dba44cdfad26c7cc74f811a6844f

Conflicts:
	core/res/res/values/config.xml
	core/res/res/values/symbols.xml
Revert "SystemUI: change back button to hide ime buttom with rotate animation."

This reverts commit 902bb4c9f3f9589023687ff5d2823725f42c765f.
Various fixes, changes, and updates