Merge "make new API to retrieve group identifier level1" into jb-mr2-dev

telephony/java/android/telephony/TelephonyManager.java

@@ -906,6 +906,24 @@ public class TelephonyManager {
         }
     }
 
+    /**
+     * Returns the Group Identifier Level1 for a GSM phone.
+     * Return null if it is unavailable.
+     * <p>
+     * Requires Permission:
+     *   {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
+     */
+    public String getGroupIdLevel1() {
+        try {
+            return getSubscriberInfo().getGroupIdLevel1();
+        } catch (RemoteException ex) {
+            return null;
+        } catch (NullPointerException ex) {
+            // This could happen before phone restarts due to crashing
+            return null;
+        }
+    }
+
     /**
      * Returns the phone number string for line 1, for example, the MSISDN
      * for a GSM phone. Return null if it is unavailable.

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

@@ -38,6 +38,11 @@ interface IPhoneSubInfo {
      */
     String getSubscriberId();
 
+    /**
+     * Retrieves the Group Identifier Level1 for GSM phones.
+     */
+    String getGroupIdLevel1();
+
     /**
      * Retrieves the serial number of the ICC, if applicable.
      */