Revert of Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/RTCUIApplication.mm

+/*
+ *  Copyright 2016 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 "RTCUIApplication.h"
+
+#if defined(WEBRTC_IOS)
+
+#import <UIKit/UIKit.h>
+
+bool RTCIsUIApplicationActive() {
+  UIApplicationState state = [UIApplication sharedApplication].applicationState;
+  return state == UIApplicationStateActive;
+}
+
+#endif // WEBRTC_IOS