SIP: the low volume problem when setting IN_CALL mode.

Switch back to NORMAL mode. (temporary solution.)

Change-Id: I4bdb006ceb38de42d93fe66d20b8c5d2cc0aeafb
diff --git a/src/com/android/sip/SipAudioCallImpl.java b/src/com/android/sip/SipAudioCallImpl.java
index 7264570..3cf1ee4 100644
--- a/src/com/android/sip/SipAudioCallImpl.java
+++ b/src/com/android/sip/SipAudioCallImpl.java
@@ -484,6 +484,8 @@
     public synchronized void setInCallMode() {
         ((AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE))
                 .setSpeakerphoneOn(false);
+        ((AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE))
+                .setMode(AudioManager.MODE_NORMAL);
     }
 
     public synchronized void setSpeakerMode() {