Play auto-answer sound when auto-answering

app/src/main/kotlin/com/tutpro/baresip/Account.kt

@@ -116,7 +116,7 @@ class Account(val accp: String) {
             "$res;mwi=yes;vm_uri=\"$vmUri\""
 
         if (answerMode == Api.ANSWERMODE_AUTO)
-            res += ";answermode=auto"
+            res += ";answermode=auto;answerdelay=1000"
 
         res += ";ptime=20;regint=${regint};regq=0.5;pubint=0;call_transfer=yes"
 

app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt

@@ -545,6 +545,8 @@ class BaresipService: Service() {
                                     startRinging()
                                 }
                             } else {
+                                val mediaPlayer = MediaPlayer.create(this, R.raw.autoanswer)
+                                mediaPlayer.start()
                                 val newIntent = Intent(this, MainActivity::class.java)
                                 newIntent.flags = Intent.FLAG_ACTIVITY_SINGLE_TOP or Intent.FLAG_ACTIVITY_CLEAR_TOP or
                                         Intent.FLAG_ACTIVITY_NEW_TASK