Merge "Introduce utility method in CarrierConfigManager to get config subset"

        }

        trm.removeCarrierConfigChangedListener(listener);

    }

    /**

     * Get subset of specified carrier configuration if available or empty bundle, without throwing

     * {@link RuntimeException} to caller.

     *

     * <p>This is a system internally used only utility to reduce the repetitive logic.

     *

     * <p>Requires Permission:

     * {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}, or the calling app

     * has carrier privileges on the specified subscription (see

     * {@link TelephonyManager#hasCarrierPrivileges()}).

     *

     * @param context Context used to get the CarrierConfigManager service.

     * @param subId The subscription ID to get the config from.

     * @param keys The config keys the client is interested in.

     * @return Config bundle with key/value for the specified keys or empty bundle when failed

     * @hide

     */

    @RequiresPermission(anyOf = {

            Manifest.permission.READ_PHONE_STATE,

            "carrier privileges",

    })

    @NonNull

    public static PersistableBundle getCarrierConfigSubset(

            @NonNull Context context, int subId, @NonNull String... keys) {

        PersistableBundle configs = null;

        CarrierConfigManager ccm = context.getSystemService(CarrierConfigManager.class);

        try {

            configs = ccm.getConfigForSubId(subId, keys);

        } catch (RuntimeException exception) {

            Rlog.w(TAG, "CarrierConfigLoader is not available.");

        }

        return configs != null ? configs : new PersistableBundle();

    }

}