Test field trial group with startswith rather than equals.

webrtc/sdk/android/src/jni/androidmediaencoder_jni.cc

 /*
  *  Copyright 2015 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 1280 matching lines @@
     JNIEnv* jni = AttachCurrentThreadIfNeeded();
     ScopedLocalRefFrame local_ref_frame(jni);
     return new MediaCodecVideoEncoder(jni, codec, egl_context_);
   }
   ALOGW << "Can not find HW video encoder for type " << codec.name;
   return nullptr;
 }
 
 const std::vector<cricket::VideoCodec>&
 MediaCodecVideoEncoderFactory::supported_codecs() const {
-  if (webrtc::field_trial::FindFullName(kH264HighProfileFieldTrial) ==
-      "Enabled")
+  if (webrtc::field_trial::IsEnabled(kH264HighProfileFieldTrial)) {
     return supported_codecs_with_h264_hp_;
-  else
+  } else {
     return supported_codecs_;
+  }
 }
 
 void MediaCodecVideoEncoderFactory::DestroyVideoEncoder(
     webrtc::VideoEncoder* encoder) {
   ALOGD << "Destroy video encoder.";
   delete encoder;
 }
 
 }  // namespace webrtc_jni