Resolve setVolume hidden API usage

Resolves the use of the  MediaPlayer#setVolume hidden API with the
public API instead as part of mainline cleanup.

Bug: 307816808
Flag: com.android.server.telecom.flags.resolve_hidden_dependencies_two
Test: m Telecom
Change-Id: Ib39fc2bccc74b22baba9969e4c61a629a1b27c6f
3 files changed