Android Auto: Play As Audio Fix and Code Clean-up

Description

This MR is a combination of several fixes:

• Always set play as audio flag (Observed a race condition where it was not always added to video files)
• Use shared media subtitle function in the album view
• Add try-catch to Artwork Provider
• Add genre to Android Auto search results
• Use separator utility class to simplify existing code
• General code-cleanup to resolve a few warnings

How Has This Been Tested?

Tested on Hyundai and Subaru Headunits (see below) using a Pixel 3 running Android 11.

Screenshots / GIFs (if appropriate):

Prior to Change (separator character is represented by a rectangle):

After Change (separator character is an ASCII bullet):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (non-breaking change which cleans up / improves existing functionality)

Checklist

• I have read the CONTRIBUTING section of the README document.

Resolves

Fixes: #2431 (closed)