AudioTrack: Enable CONTENT_TYPE_SPEECH for automatic power savings

Flag: EXEMPT bugfix
Test: play audible podcast, check DEEP_BUFFER sink
Bug: 352145375
Merged-In: I4adfe8aa573a04d7a873f029d04c51eb6ca12d91
Change-Id: I4adfe8aa573a04d7a873f029d04c51eb6ca12d91
1 file changed