Remove the video capture module on Android.

webrtc/modules/video_capture/video_capture_factory.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
 #include "webrtc/modules/video_capture/include/video_capture_factory.h"
 
 #include "webrtc/modules/video_capture/video_capture_impl.h"
 
 namespace webrtc
 {
 
 VideoCaptureModule* VideoCaptureFactory::Create(const int32_t id,
     const char* deviceUniqueIdUTF8) {
+#if defined(ANDROID)
+  return nullptr;
+#else
   return videocapturemodule::VideoCaptureImpl::Create(id, deviceUniqueIdUTF8);
+#endif
 }
 
 VideoCaptureModule* VideoCaptureFactory::Create(const int32_t id,
     VideoCaptureExternal*& externalCapture) {
   return videocapturemodule::VideoCaptureImpl::Create(id, externalCapture);
 }
 
 VideoCaptureModule::DeviceInfo* VideoCaptureFactory::CreateDeviceInfo(
     const int32_t id) {
+#if defined(ANDROID)
+  return nullptr;
+#else
   return videocapturemodule::VideoCaptureImpl::CreateDeviceInfo(id);
+#endif
 }
 
 }  // namespace webrtc