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/slices/SliceDataConverter.java

@@ -213,6 +213,7 @@ class SliceDataConverter {
                 final String unavailableSliceSubtitle = bundle.getString(
                         METADATA_UNAVAILABLE_SLICE_SUBTITLE);
                 final boolean isPublicSlice = controller.isPublicSlice();
+                final int highlightMenuRes = controller.getSliceHighlightMenuRes();
 
                 final SliceData xmlSlice = new SliceData.Builder()
                         .setKey(key)
@@ -226,6 +227,7 @@ class SliceDataConverter {
                         .setSliceType(sliceType)
                         .setUnavailableSliceSubtitle(unavailableSliceSubtitle)
                         .setIsPublicSlice(isPublicSlice)
+                        .setHighlightMenuRes(highlightMenuRes)
                         .build();
 
                 xmlSliceData.add(xmlSlice);