audio policy: add audio port gain control

Implement setAudioPortConfig() API to configure an
audio port.
Currently limited to gain control.

Bug: 14815883.

Change-Id: Ic1b268e5ba5c277e9f5b8fa63c81dd7c0b250024
diff --git a/services/audiopolicy/AudioPolicyClientImpl.cpp b/services/audiopolicy/AudioPolicyClientImpl.cpp
index cbab841..c322d92 100644
--- a/services/audiopolicy/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/AudioPolicyClientImpl.cpp
@@ -195,6 +195,13 @@
     return mAudioPolicyService->clientReleaseAudioPatch(handle, delayMs);
 }
 
+status_t AudioPolicyService::AudioPolicyClient::setAudioPortConfig(
+                                                        const struct audio_port_config *config,
+                                                        int delayMs)
+{
+    return mAudioPolicyService->clientSetAudioPortConfig(config, delayMs);
+}
+
 void AudioPolicyService::AudioPolicyClient::onAudioPortListUpdate()
 {
     mAudioPolicyService->onAudioPortListUpdate();