VideoCapturerAndroid: Fix threading issues

talk/app/webrtc/java/jni/androidvideocapturer_jni.cc

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 70 matching lines @@
         jni(), *j_video_capturer_class_, "init", "(Ljava/lang/String;)Z"));
   if (!jni()->CallBooleanMethod(*j_capturer_global_, m, device_name)) {
     return false;
   }
   CHECK_EXCEPTION(jni()) << "error during CallVoidMethod";
   return true;
 }
 
 AndroidVideoCapturerJni::~AndroidVideoCapturerJni() {
   LOG(LS_INFO) << "AndroidVideoCapturerJni dtor";
+  jni()->CallVoidMethod(
+      *j_capturer_global_,
+      GetMethodID(jni(), *j_video_capturer_class_, "release", "()V"));
+  CHECK_EXCEPTION(jni()) << "error during VideoCapturerAndroid.release()";
 }
 
 void AndroidVideoCapturerJni::Start(int width, int height, int framerate,
                                     webrtc::AndroidVideoCapturer* capturer) {
   LOG(LS_INFO) << "AndroidVideoCapturerJni start";
   RTC_DCHECK(thread_checker_.CalledOnValidThread());
   {
     rtc::CritScope cs(&capturer_lock_);
     RTC_CHECK(capturer_ == nullptr);
     RTC_CHECK(invoker_.get() == nullptr);
@@ skipping 135 matching lines @@
 
 JOW(void, VideoCapturerAndroid_00024NativeObserver_nativeOnOutputFormatRequest)
     (JNIEnv* jni, jclass, jlong j_capturer, jint j_width, jint j_height,
         jint j_fps) {
   LOG(LS_INFO) << "NativeObserver_nativeOnOutputFormatRequest";
   reinterpret_cast<AndroidVideoCapturerJni*>(j_capturer)->OnOutputFormatRequest(
       j_width, j_height, j_fps);
 }
 
 }  // namespace webrtc_jni