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
diff --git a/services/audiopolicy/AudioPolicyManager.h b/services/audiopolicy/AudioPolicyManager.h
index e012d63..472d895 100644
--- a/services/audiopolicy/AudioPolicyManager.h
+++ b/services/audiopolicy/AudioPolicyManager.h
@@ -360,6 +360,7 @@
         static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT];
         // volume curve for media strategy on speakers
         static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT];
+        static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT];
         // volume curve for sonification strategy on speakers
         static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT];
         static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT];