Address NewApi Android lint warnings in src/media.

media/base/android/java/src/org/chromium/media/VideoCaptureCamera2.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.media;
 
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.ImageFormat;
 import android.hardware.camera2.CameraAccessException;
 import android.hardware.camera2.CameraCaptureSession;
 import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraDevice;
 import android.hardware.camera2.CameraManager;
 import android.hardware.camera2.CameraMetadata;
 import android.hardware.camera2.CaptureRequest;
 import android.hardware.camera2.params.StreamConfigurationMap;
 import android.media.Image;
 import android.media.ImageReader;
+import android.os.Build;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.util.Log;
 import android.util.Size;
 import android.view.Surface;
 
 import org.chromium.base.JNINamespace;
 
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
 /**
  * This class implements Video Capture using Camera2 API, introduced in Android
  * API 21 (L Release). Capture takes place in the current Looper, while pixel
  * download takes place in another thread used by ImageReader. A number of
  * static methods are provided to retrieve information on current system cameras
  * and their capabilities, using android.hardware.camera2.CameraManager.
  **/
 @JNINamespace("media")
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 public class VideoCaptureCamera2 extends VideoCapture {
 
     // Inner class to extend a CameraDevice state change listener.
     private class CrStateListener extends CameraDevice.StateCallback {
         @Override
         public void onOpened(CameraDevice cameraDevice) {
             mCameraDevice = cameraDevice;
             mOpeningCamera = false;
             mConfiguringCamera = true;
             if (!createCaptureObjects()) {
@@ skipping 374 matching lines @@
         mCameraDevice.close();
 
         return true;
     }
 
     @Override
     public void deallocate() {
         Log.d(TAG, "deallocate");
     }
 }