Audio policy: new media volume curve for speaker with DRC

For devices with DRC on speaker (using the flag "speaker_drc_enabled"
 in audio_policy.conf), set the speaker media volume to use a
 new curve with more aggressive attenuation in the upper range.

Bug 15318604

Change-Id: Ia5fb9fdd608fddad22fadfb1065d35574030bb52
2 files changed