fix: Document Picture-in-Picture: Use width/height instead of initialAspectRatio

[beaufortfrancois]

The initialAspectRatio option was removed from the Document Picture-in-Picture spec in favour of width and height, so we should use them. See WICG/document-picture-in-picture#36

[codecov]

Codecov Report

Merging #8270 (ebf472f) into main (1491d71) will increase coverage by 82.36%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           main    #8270       +/-   ##
=========================================
+ Coverage      0   82.36%   +82.36%     
=========================================
  Files         0      112      +112     
  Lines         0     7474     +7474     
  Branches      0     1800     +1800     
=========================================
+ Hits          0     6156     +6156     
- Misses        0     1318     +1318     

Impacted Files	Coverage Δ
src/js/player.js	90.27% <ø> (ø)

... and 111 files with indirect coverage changes

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[mister-ben]

Thanks. Seems setting width and height has the same issue as with aspect ratio of sizing the outer pip window rather than setting the content size.

[beaufortfrancois]

Shall we merge?