Add support for creating HW codecs in VideoProcessor tests.

webrtc/modules/video_coding/codecs/test/android_test_initializer.h

+/*
+ *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_ANDROID_TEST_INITIALIZER_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_ANDROID_TEST_INITIALIZER_H_
+
+namespace webrtc {
+
+void InitializeAndroidObjects();
+void FreeAndroidObjects();
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_TEST_ANDROID_TEST_INITIALIZER_H_