添加设置pitch接口，对讲start之前设置有效，对讲过程中设置pitch无法改变本次对讲音调。

Change-Id: Ib7e4250acdf0020296b222c49bf6bf2459cad8e4

Author: SundoggyNew

sdk/video-link-android/src/main/java/com/tencent/iot/video/link/util/audio/AudioRecordUtil.java

@@ -93,6 +93,7 @@ private void init(int sampleRate, int channel, int bitDepth) {
         } else if (channel == AudioFormat.CHANNEL_IN_STEREO) {
             this.channelCount = 2;
         }
+        Log.e(TAG, "AudioRecordUtil init Pitch is: "+ pitch);
     }
 
     public void recordSpeakFlv(boolean isRecord) {
@@ -117,6 +118,12 @@ public void recordSpeakFlv(boolean isRecord) {
         }
     }
 
+    // start之前设置有效 start过程中无法改变本次对讲音调
+    public void setPitch(int pitch) {
+        Log.e(TAG, "setPitch is: "+ pitch);
+        this.pitch = pitch;
+    }
+
     /**
      * 开始录制
      */