Add a new column for slices_index table.

To distinguish public and non-public slices, add public_slice column
to the database so we can return corresponding results based on this
value.

Bug: 141088937
Test: robotests
Change-Id: I05d003875a8be27e5cb735b4814eb86d6dc40174

src/com/android/settings/slices/SliceDataConverter.java

@@ -212,6 +212,7 @@ class SliceDataConverter {
                 final int sliceType = controller.getSliceType();
                 final String unavailableSliceSubtitle = bundle.getString(
                         METADATA_UNAVAILABLE_SLICE_SUBTITLE);
+                final boolean isPublicSlice = controller.isPublicSlice();
 
                 final SliceData xmlSlice = new SliceData.Builder()
                         .setKey(key)
@@ -224,6 +225,7 @@ class SliceDataConverter {
                         .setFragmentName(fragmentName)
                         .setSliceType(sliceType)
                         .setUnavailableSliceSubtitle(unavailableSliceSubtitle)
+                        .setIsPublicSlice(isPublicSlice)
                         .build();
 
                 xmlSliceData.add(xmlSlice);