Move factoryReset to service and protect.

bug:16161518
Change-Id: I02d1bbae1887c62ee426e6f03e8bc1f18c6666bf

telephony/java/android/telephony/TelephonyManager.java

@@ -4550,15 +4550,12 @@ public class TelephonyManager {
      * @hide
      */
     public void factoryReset(int subId) {
-        if (SubscriptionManager.isUsableSubIdValue(subId)) {
-            // Enable data
-            setDataEnabled(subId, true);
-            // Set network selection mode to automatic
-            setNetworkSelectionModeAutomatic(subId);
-            // Set preferred mobile network type to the best available
-            setPreferredNetworkType(subId, RILConstants.PREFERRED_NETWORK_MODE);
-            // Turn off roaming
-            SubscriptionManager.from(mContext).setDataRoaming(0, subId);
+        try {
+            Log.d(TAG, "factoryReset: subId=" + subId);
+            ITelephony telephony = getITelephony();
+            if (telephony != null)
+                telephony.factoryReset(subId);
+        } catch (RemoteException e) {
         }
     }
 }

telephony/java/com/android/internal/telephony/ITelephony.aidl

@@ -942,4 +942,6 @@ interface ITelephony {
      * Returns the subscription ID associated with the specified PhoneAccount.
      */
     int getSubIdForPhoneAccount(in PhoneAccount phoneAccount);
+
+    void factoryReset(int subId);
 }