Revert^4 "Reapply "AudioFlinger: Control volume using Port ID""

This reverts commit 2e077f0fb2478163c82ca15b18b0fa67fabcb217.

Reason for revert: forward fix will be applied

Change-Id: I82f8e29c788e6b1be59e81f127472f7cd36cd126
diff --git a/services/audiopolicy/service/AudioPolicyClientImpl.cpp b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
index 22fc151..9a5365c 100644
--- a/services/audiopolicy/service/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyClientImpl.cpp
@@ -191,6 +191,16 @@
                                                delay_ms);
 }
 
+status_t AudioPolicyService::AudioPolicyClient::setPortsVolume(
+        const std::vector<audio_port_handle_t> &ports, float volume, audio_io_handle_t output,
+        int delayMs)
+{
+    if (ports.empty()) {
+        return NO_ERROR;
+    }
+    return mAudioPolicyService->setPortsVolume(ports, volume, output, delayMs);
+}
+
 void AudioPolicyService::AudioPolicyClient::setParameters(audio_io_handle_t io_handle,
                    const String8& keyValuePairs,
                    int delay_ms)