Revert "Merge "Add back navigation ring customization." into cm-11.0"

This reverts commit 2f106cd01c5c65a89fe8133e793fd4343dbc4685, reversing
changes made to f37a49dd96ff1f5374becc48ae886630d75476d8.

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

Change-Id: I3e61015e93533376a6312019df5991e3c1652dc7