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

tests/unit/src/com/android/settings/network/ProviderModelSliceHelperTest.java

@@ -302,6 +302,11 @@ public class ProviderModelSliceHelperTest {
         public Intent getIntent() {
             return new Intent();
         }
+
+        @Override
+        public int getSliceHighlightMenuRes() {
+            return 0;
+        }
     }
 
     private class MockProviderModelSliceHelper extends ProviderModelSliceHelper {