Add a new method in Sliceable.

We are making some Settings Slices public and some not so we can expose
more Settings Slices to Settings Search without worrying about privacy
and security concern. Hence, add this method to distinguish these two.

Bug: 141088937
Test: rebuild
Change-Id: I457802bb6472ec81a3dfb65c0674af4bb3dd4b5a
1 file changed