Improve album art handling

- Use ThumbnailUtils to handle resizing and cropping images to the right
dimensions

- Check alternate fields for album art information, preferring URIs over
bitmap, with largeIcon as a fallback if none of those fields are set

Fixes: 153178112
Fixes: 151054111
Fixes: 152067055
Test: visual
Change-Id: Iea23e1159ffaecac31d0f475c129e8b927a38b86