Telephony: Register/Unregister Phones with CallManager

Unregister the outgoing phone and register the new one when Technology change
is detected. Otherwise, CallManager keeps trying to use an already dead phone,
which causes a crash

Change-Id: I2a04c76ce882d034d1a2073d2a9f9739d4dd9a38

Author: Jaime Lopez

telephony/java/com/android/internal/telephony/PhoneProxy.java

@@ -36,6 +36,7 @@
 import com.android.internal.telephony.gsm.NetworkInfo;
 import com.android.internal.telephony.gsm.GsmDataConnection;
 import com.android.internal.telephony.test.SimulatedRadioControl;
+import com.android.internal.telephony.CallManager;
 
 import java.util.List;
 
@@ -88,6 +89,7 @@ public void handleMessage(Message msg) {
 
             if(mOutgoingPhone.equals("GSM")) {
                 logd("Make a new CDMAPhone and destroy the old GSMPhone.");
+                CallManager.getInstance().unregisterPhone(mActivePhone);
 
                 ((GSMPhone)mActivePhone).dispose();
                 Phone oldPhone = mActivePhone;
@@ -100,9 +102,11 @@ public void handleMessage(Message msg) {
 
                 mActivePhone = PhoneFactory.getCdmaPhone();
                 ((GSMPhone)oldPhone).removeReferences();
+                CallManager.getInstance().registerPhone(mActivePhone);
                 oldPhone = null;
             } else {
                 logd("Make a new GSMPhone and destroy the old CDMAPhone.");
+                CallManager.getInstance().unregisterPhone(mActivePhone);
 
                 ((CDMAPhone)mActivePhone).dispose();
                 //mActivePhone = null;
@@ -116,6 +120,7 @@ public void handleMessage(Message msg) {
 
                 mActivePhone = PhoneFactory.getGsmPhone();
                 ((CDMAPhone)oldPhone).removeReferences();
+                CallManager.getInstance().registerPhone(mActivePhone);
                 oldPhone = null;
             }