AudioPlayerView: Constraints refactor

This merge request brings an adjustment to the audio player's view:

• The .xib file is dropped and the view is setup programmatically in order to have a better overview of the constraints.
• The constraints errors generated by Xcode are also fixed.

There is no major visual changes but this merge request also brings a fix to the thumbnail view constraints that better fit the screen of the device.

iPhone 4S (very small screen) comparison

=>

iPhone 6 (small screen)

iPhone 8 Plus (large screen) comparison

=>

iPhone 14 - 14 Pro (recent devices)

This merge request also brings a fix to the status bar style that is now set to light, making it always readable.