Adding Java wrapper for DtmfSender.

webrtc/sdk/android/instrumentationtests/src/org/webrtc/PeerConnectionTest.java

 /*
  *  Copyright 2013 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.
  */
 
@@ skipping 698 matching lines @@
     for (IceCandidate candidate : answeringExpectations.getAtLeastOneIceCandidate()) {
       offeringPC.addIceCandidate(candidate);
     }
 
     assertTrue(offeringExpectations.waitForAllExpectationsToBeSatisfied(TIMEOUT_SECONDS));
     assertTrue(answeringExpectations.waitForAllExpectationsToBeSatisfied(TIMEOUT_SECONDS));
 
     assertEquals(PeerConnection.SignalingState.STABLE, offeringPC.signalingState());
     assertEquals(PeerConnection.SignalingState.STABLE, answeringPC.signalingState());
 
-    // Set a bitrate limit for the outgoing video stream for the offerer.
+    // Test some of the RtpSender API.
     RtpSender videoSender = null;
+    RtpSender audioSender = null;
     for (RtpSender sender : offeringPC.getSenders()) {
       if (sender.track().kind().equals("video")) {
         videoSender = sender;
+      } else {
+        audioSender = sender;
       }
     }
     assertNotNull(videoSender);
+    assertNotNull(audioSender);
+
+    // Set a bitrate limit for the outgoing video stream for the offerer.
     RtpParameters rtpParameters = videoSender.getParameters();
     assertNotNull(rtpParameters);
     assertEquals(1, rtpParameters.encodings.size());
     assertNull(rtpParameters.encodings.get(0).maxBitrateBps);
 
     rtpParameters.encodings.get(0).maxBitrateBps = 300000;
     assertTrue(videoSender.setParameters(rtpParameters));
 
+    // Create a DTMF sender.
+    DtmfSender dtmfSender = audioSender.dtmf();
+    assertNotNull(dtmfSender);
+    assertTrue(dtmfSender.canInsertDtmf());
+    assertTrue(dtmfSender.insertDtmf("123", 300, 100));
+
     // Verify that we can read back the updated value.
     rtpParameters = videoSender.getParameters();
     assertEquals(300000, (int) rtpParameters.encodings.get(0).maxBitrateBps);
 
     // Test send & receive UTF-8 text.
     answeringExpectations.expectMessage(
         ByteBuffer.wrap("hello!".getBytes(Charset.forName("UTF-8"))), false);
     DataChannel.Buffer buffer =
         new DataChannel.Buffer(ByteBuffer.wrap("hello!".getBytes(Charset.forName("UTF-8"))), false);
     assertTrue(offeringExpectations.dataChannel.send(buffer));
@@ skipping 309 matching lines @@
     TreeSet<String> threads = new TreeSet<String>();
     // This pokes at /proc instead of using the Java APIs because we're also
     // looking for libjingle/webrtc native threads, most of which won't have
     // attached to the JVM.
     for (String threadId : (new File("/proc/self/task")).list()) {
       threads.add(threadId);
     }
     return threads;
   }
 }