Crash when shuffling on device with no songs

[Vukašin Manojlović]

App Version:

1.5

Affected Device(s):

Google Pixel 2 XL with Android 9.0 (and others)

Describe the Bug:

The app crashes when trying to shuffle on a device with no songs.

To Reproduce:

1. Remove all songs from the device.
2. Click the shuffle button.

Expected Behavior:

The app should show an error indicating what's the problem.