Fix cover for default albums with cloud media

Previously, if a default album has a cloud media cover, it would not
show up in the Albums tab fragment because we were assuming album cover
could only be local media. Now album authority is set based on the
cover media source, which fixes the issue.

Bug: 239049479
Test: Manually tested - Screenshots attached to the bug
Change-Id: I03ecdd406abfaef93b5efccef45757bc80b1c879
7 files changed