Camera: implement camera audio restriction API

Test: new CTS test
Bug: 135676184
Change-Id: I5f26e343a4ee92b66fabfaa6bda94224ae311c40
diff --git a/services/camera/libcameraservice/api1/Camera2Client.h b/services/camera/libcameraservice/api1/Camera2Client.h
index a9ea271..8df8d2b 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.h
+++ b/services/camera/libcameraservice/api1/Camera2Client.h
@@ -83,6 +83,7 @@
     virtual void            notifyError(int32_t errorCode,
                                         const CaptureResultExtras& resultExtras);
     virtual status_t        setVideoTarget(const sp<IGraphicBufferProducer>& bufferProducer);
+    virtual int32_t         setAudioRestriction(int mode);
 
     /**
      * Interface used by CameraService