DO NOT MERGE - Small documentation fix for AudioManager.java

Correct typo + copy-paste description issue.

Cherry-pick of CL Idce7cfeb7255d96aef91efc40d19f077dde3e9a5 from
master.

Change-Id: I1b6f378d58eafdd4a265672a12189273b41f72d6
1 file changed