Add sliding window for the playback queue when in Android Auto mode.
Description
Adds a sliding window of 15 tracks (7 before, the current track, and 7 after), visible in the playback queue. The window slides with the current tack number, so if the first track is played, tracks 1-15 will show, if the last track is played the last track minus 15 will show, etc.
Motivation and Context
Android Auto limits the number of visible tracks to 20 when the vehicle is not in park. If you have a large playlist, it is no longer possible to use the queue to see the upcoming track names. This resolves the issue.
How Has This Been Tested?
Evaluated in-vehicle for several weeks.
Types of changes
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New feature (non-breaking change which adds functionality)
Checklist
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I have read the CONTRIBUTING section of the README document.
More Information
Mention: #1514 (closed)