fix record 3gp

Author: xhp

android/chatinput/src/main/java/cn/jiguang/imui/chatinput/record/RecordHelper.java

@@ -57,7 +57,7 @@ public void startRecording() {
             recorder = new MediaRecorder();
             recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
             recorder.setMaxDuration(MAX_INTERVAL_TIME * 1000);
-            recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
+            recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
             recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
 //            recorder.setAudioEncodingBitRate();
 //            recorder.setAudioSamplingRate();