Support slice deep links highlighting menu entries

- Add an interface to get highlight menu key resource in Sliceable
- Force implementing the new interface in TogglePreferenceController and
  CustomSliceable at syntax level
- Update the slice index db schema

Bug: 204695404
Test: manual, robotest build pass, unit
Change-Id: I0b5068bccd04f1590023de7f3385bc0a4c6fa47b

src/com/android/settings/core/TogglePreferenceController.java

@@ -89,4 +89,7 @@ public abstract class TogglePreferenceController extends BasePreferenceControlle
     public boolean isPublicSlice() {
         return false;
     }
+
+    @Override
+    public abstract int getSliceHighlightMenuRes();
 }