Fix some small flaws in Call Redirection service

    private final Context mContext;

    private final CallsManager mCallsManager;

    private final PhoneAccountRegistrar mPhoneAccountRegistrar;

    private String mOriginalPostDialDigits = null;

    private String mOriginalPostDialDigits = "";

    public CallRedirectionProcessorHelper(

            Context context,

        }

        Intent intent = new Intent(CallRedirectionService.SERVICE_INTERFACE)

                .setPackage(packageName);

        return getComponentName(intent, CallRedirectionProcessor.SERVICE_TYPE_CARRIER);

        return getComponentName(intent, CallRedirectionProcessor.SERVICE_TYPE_USER_DEFINED);

    }

    @VisibleForTesting

    protected void storePostDialDigits(Uri handle) {

        String number = handle.getSchemeSpecificPart();

        mOriginalPostDialDigits += PhoneNumberUtils.extractPostDialPortion(number);

        String postDialPortion = PhoneNumberUtils.extractPostDialPortion(number);

        if (postDialPortion != null) {

            mOriginalPostDialDigits = postDialPortion;

        }

        Log.i(this, "storePostDialDigits, stored post dial digits: "

                + Log.pii(mOriginalPostDialDigits));

    }