Move all the examples from the talk directory into the webrtc examples directory.

Significant changes:

- move the libjingle_examples.gyp file into webrtc directory.
- rename talk/examples/android to webrtc/examples/androidapp to avoid name conflicts.
- update paths in talk/libjingle_tests.gyp to point to webrtc directory for Objective-C test.

BUG=
R=pthatcher@webrtc.org, tkchin@webrtc.org

Review URL: https://codereview.webrtc.org/1235563006 .

Cr-Commit-Position: refs/heads/master@{#9681}
diff --git a/webrtc/examples/objc/AppRTCDemo/RTCMediaConstraints+JSON.h b/webrtc/examples/objc/AppRTCDemo/RTCMediaConstraints+JSON.h
new file mode 100644
index 0000000..dd4813a
--- /dev/null
+++ b/webrtc/examples/objc/AppRTCDemo/RTCMediaConstraints+JSON.h
@@ -0,0 +1,19 @@
+/*
+ *  Copyright 2014 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.
+ */
+
+#import "RTCMediaConstraints.h"
+
+@interface RTCMediaConstraints (JSON)
+
++ (RTCMediaConstraints *)constraintsFromJSONDictionary:
+    (NSDictionary *)dictionary;
+
+@end
+