Add a clarifying comment

            Settings.System.putInt(getContext().getContentResolver(),

                    getVibrationIntensitySetting(), candidate.getIntensity());

        } else {

            // We can't play preview effect here for all cases because that causes a data race

            // (VibratorService may access intensity settings before these settings are updated).

            // But we can't just play it in intensity settings update observer, because the

            // intensity settings are not changed if we turn the vibration off, then on.

            //

            // In this case we sould play the preview here.

            // To be refactored in b/132952771

            playVibrationPreview();

        }

    }