Don't wipe out compound drawable tinting

Currently we always 'tint' (or clear the tint)
on a compound drawable. This CL fixes it by only
loading the tint info if it's a drawable we care
about.

BUG: 25128785
Change-Id: I5d9c57556aa837b9a5c3eccb489e0b5b839de2e5
1 file changed