[ios] Fix the circular downloading progress bar layout on the PP screen

[kirylkaveryn]

Closes #7782

I cannot reproduce such a huge mismatch, but I found that the device rotation will trigger the progress bar layout reloading, but the bar's backgroundLayer will not update its path.

This PR fixes this issue by refreshing the backgroundLayer's path too.

How to reproduce:

• Start downloading some maps
• Tap on the some PP in this region
• Rotate the device
• You will see a small gap between bars
• It will be more visible if you open PP in the horizontal orientation and rotate to the vertical.

Tested on:

• iOS 17.2 (iPhone 11 pro - device)
• iOS 15.5 (iPhone 15 pro - simulator)

Before:

(it's hard to see it on the gif)

After:

[biodranik]

Thanks! Are there any better ideas on a simpler download indicator (e.g. a text percent progress), that can also be used as a Cancel button? @euf