fade out and fade in on play/pause

[Snake56Snake]

Actual behaviour

• music stops immediately on pause and starts immediately on resume

Expected behaviour

• I would like to have the option that the music fade out on pause and fade in on resume

Environment data

Android version: 6.0.1

Device model: oneplis one A001

Stock or customized system: custom (cyanogen mod)

Music-Player app version: 1.3.1