Flesh out CR.getTypeDrawable() with more details.

Providing icons for MIME types is generally useful, but we also
need to provide a label and content description.  This interface
can be extended internally to surface details about special MIME
types, such as "image/vnd.google.panorama360+jpg".

Bug: 122887179, 120791890
Test: atest android.content.cts.ContentResolverTest
Change-Id: If62ee1a628feb909cd7b30ecf6e61f6845112d82