Revert "Revert "Ensure MediaSession is ONLY made active when routed to wired headset.""

This reverts commit 3beead23d884c4fdbcd5e19c7b0d048fcefbe0ae.

Reason for revert: Re-landing with special case fix for accessibility

Change-Id: I04038fe9fc586e7d5995629aebf8b193d929a445
2 files changed