Revert "Remove MediaController2 usages in MediaSessionServiceImpl"

This reverts commit c1e4316e023a3632466203fe84481f4caf4fd26a.

Reason for revert: Now the circular dependency problem is resolved, this change is now obsolete.

Bug: 123336670
Change-Id: I065d811e9b8a3c7f851fb66d9527d62b417f1420
10 files changed