DO NOT MERGE - Merge pie-platform-release (PPRL.190105.001) into stage-aosp-master

import android.content.IntentFilter;

import android.hardware.ICameraService;

import android.hardware.ICameraServiceProxy;

import android.media.AudioManager;

import android.metrics.LogMaker;

import android.nfc.INfcAdapter;

import android.os.Binder;

            boolean wasEmpty = mActiveCameraUsage.isEmpty();

            switch (newCameraState) {

                case ICameraServiceProxy.CAMERA_STATE_OPEN:

                    // Notify the audio subsystem about the facing of the most-recently opened

                    // camera This can be used to select the best audio tuning in case video

                    // recording with that camera will happen.  Since only open events are used, if

                    // multiple cameras are opened at once, the one opened last will be used to

                    // select audio tuning.

                    AudioManager audioManager = getContext().getSystemService(AudioManager.class);

                    if (audioManager != null) {

                        // Map external to front for audio tuning purposes

                        String facingStr = (facing == ICameraServiceProxy.CAMERA_FACING_BACK) ?

                                "back" : "front";

                        String facingParameter = "cameraFacing=" + facingStr;

                        audioManager.setParameters(facingParameter);

                    }

                    break;

                case ICameraServiceProxy.CAMERA_STATE_ACTIVE:

                    CameraUsageEvent newEvent = new CameraUsageEvent(facing, clientName, apiLevel);