Add A Working Loop Song Button.

[AnshSinghSonkhia]

A button which can be used to play one song on loop.

• [ ] Added A Working Loop Button in the Bottom Bar in the left of previous button.
• [ ] This button is working properly.
• [ ] The current song must start playing again after getting finished.

[Cursed-Ninja]

Kindly assign this to me.

[Cursed-Ninja]

I've made a pull request. Kindly review it.