CallManager: remove unused Phone argument from stopDtmf() and sendBurstDtmf()

Change-Id: Ib0c83c373580f7be9cb1ee262cd0098c70db9c64
diff --git a/telephony/java/com/android/internal/telephony/CallManager.java b/telephony/java/com/android/internal/telephony/CallManager.java
index 980affa..12df44e 100644
--- a/telephony/java/com/android/internal/telephony/CallManager.java
+++ b/telephony/java/com/android/internal/telephony/CallManager.java
@@ -691,8 +691,8 @@
      * Stop the playing DTMF tone. Ignored if there is no playing DTMF
      * tone or no active call.
      */
-    public void stopDtmf(Phone phone) {
-        phone.stopDtmf();
+    public void stopDtmf() {
+        if (hasActiveFgCall()) getFgPhone().stopDtmf();
     }
 
     /**
@@ -709,7 +709,7 @@
      * @param onComplete is the callback message when the action is processed by BP
      *
      */
-    public boolean sendBurstDtmf(Phone phone, String dtmfString, int on, int off, Message onComplete) {
+    public boolean sendBurstDtmf(String dtmfString, int on, int off, Message onComplete) {
         if (hasActiveFgCall()) {
             getActiveFgCall().getPhone().sendBurstDtmf(dtmfString, on, off, onComplete);
             return true;