Filter roots based on incoming request.

When incoming request is for local-only content, or for ACTION_CREATE,
only include roots advertise those features.

Filters roots based on the allowed MIME types and the supported types
advertised by each root.  This supports displaying Images and Audio
roots only when requesting those content types.  Applies the same
filter when deciding which roots to query for recents.

Fixes advanced filtering instead of limiting to just devices. Update
sorting so that Recent always appears first. Add testing support for
LOCAL_ONLY.

Bug: 10597317, 10526535
Change-Id: Ic5ccf475c4fe93fd52b29388d369d7f6915c0c42