[toro] Add telephonyManager API ( getMsisdnNumber() ) for IMS Module.

IMS Module need the MSISDN value for IMS registration.(VZW Requirement)

Change-Id: I8713b6c55788276246ee1c2f91eaf2d3ab8cc813
Signed-off-by: duckyoung.chai <duckyoung.chai@samsung.com>

telephony/java/android/telephony/TelephonyManager.java

@@ -761,6 +761,26 @@ public class TelephonyManager {
         }
     }
 
+    /**
+     * Returns the MSISDN string.
+     * for a GSM phone. Return null if it is unavailable.
+     * <p>
+     * Requires Permission:
+     *   {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
+     *
+     * @hide
+     */
+    public String getMsisdn() {
+        try {
+            return getSubscriberInfo().getMsisdn();
+        } catch (RemoteException ex) {
+            return null;
+        } catch (NullPointerException ex) {
+            // This could happen before phone restarts due to crashing
+            return null;
+        }
+    }
+
     /**
      * Returns the voice mail number. Return null if it is unavailable.
      * <p>

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

@@ -53,6 +53,11 @@ interface IPhoneSubInfo {
      */
     String getLine1AlphaTag();
 
+    /**
+     * Retrieves MSISDN Number.
+     */
+    String getMsisdn();
+
     /**
      * Retrieves the voice mail number.
      */

telephony/java/com/android/internal/telephony/PhoneSubInfo.java

@@ -104,6 +104,14 @@ public class PhoneSubInfo extends IPhoneSubInfo.Stub {
         return (String) mPhone.getLine1AlphaTag();
     }
 
+    /**
+     * Retrieves the MSISDN string.
+     */
+    public String getMsisdn() {
+        mContext.enforceCallingOrSelfPermission(READ_PHONE_STATE, "Requires READ_PHONE_STATE");
+        return mPhone.getMsisdn();
+    }
+
     /**
      * Retrieves the voice mail number.
      */

telephony/java/com/android/internal/telephony/PhoneSubInfoProxy.java

@@ -74,6 +74,13 @@ public class PhoneSubInfoProxy extends IPhoneSubInfo.Stub {
         return mPhoneSubInfo.getLine1AlphaTag();
     }
 
+    /**
+     * Retrieves the MSISDN Number.
+     */
+    public String getMsisdn() {
+        return mPhoneSubInfo.getMsisdn();
+    }
+
     /**
      * Retrieves the voice mail number.
      */