Add an interface in SettingsInjector to log metrics

        return new Preference(prefContext);

    }

    /**

     * Gives descendants a chance to log Preference click event

     */

    protected void logPreferenceClick(Intent intent) {

    }

    /**

     * Returns the settings parsed from the attributes of the

     * {@link SettingInjectorService#META_DATA_NAME} tag, or null.

            // Settings > Location.

            Intent settingIntent = new Intent();

            settingIntent.setClassName(mInfo.packageName, mInfo.settingsActivity);

            logPreferenceClick(settingIntent);

            // Sometimes the user may navigate back to "Settings" and launch another different

            // injected setting after one injected setting has been launched.

            //