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/robotests/src/com/android/settings/slices/SettingsSliceProviderTest.java

@@ -707,6 +707,7 @@ public class SettingsSliceProviderTest {
                 .setIcon(SliceTestUtils.FAKE_ICON)
                 .setFragmentName(SliceTestUtils.FAKE_FRAGMENT_NAME)
                 .setPreferenceControllerClassName(SliceTestUtils.FAKE_CONTROLLER_NAME)
+                .setHighlightMenuRes(SliceTestUtils.FAKE_HIGHLIGHT_MENU_RES)
                 .build();
     }