fix: adds workaround for non-spec-compliant userAgentData

[iamtang]

Description

On some Android phones, 'window. navigator. userAgentData' may be '{}', resulting in IS_ANDROID=UAD. platform==='Android' being false

Specific Changes proposed

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

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[codecov]

Codecov Report

Merging #8474 (309b73b) into main (cd2dac4) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #8474   +/-   ##
=======================================
  Coverage   82.71%   82.71%           
=======================================
  Files         113      113           
  Lines        7589     7589           
  Branches     1826     1826           
=======================================
  Hits         6277     6277           
  Misses       1312     1312           

Files	Coverage Δ
src/js/utils/browser.js	56.73% <100.00%> (ø)

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[gkatsev]

Seems reasonable to have the check, though, I think those android devices are technically not spec compliant. It doesn't seem like the spec allows userAgentData object to be an empty object.

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