Merge "Properly catch ServiceSpecificException if IMS isn't available"

import android.annotation.WorkerThread;

import android.os.Binder;

import android.os.RemoteException;

import android.os.ServiceSpecificException;

import android.telephony.CarrierConfigManager;

import android.telephony.SubscriptionManager;

import android.telephony.TelephonyFrameworkInitializer;

        callback.setExecutor(executor);

        try {

            getITelephony().registerImsProvisioningChangedCallback(mSubId, callback.getBinder());

        } catch (ServiceSpecificException e) {

            throw new ImsException(e.getMessage(), e.errorCode);

        } catch (RemoteException | IllegalStateException e) {

            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);

        }