Revert "Revert "Add back navigation ring customization.""

This reverts commit 47606618261922c3d7acda559e9eaadbd1773ea8.

Conflicts:

	packages/SystemUI/src/com/android/systemui/SearchPanelView.java

Change-Id: I1b736461d263e965fd6a58ee2b43ce757fad4fae