feat: allow webkit version override

[erisu]

Motivation, Context & Description

Allow androidx.webkit version overrides.

Forked of #1253. Requires parent PR merged in first.

Testing

• npm t
• build
• changing of versions

Checklist

• I've run the tests to see all new and existing tests pass
• I've updated the documentation if necessary

[codecov-commenter]

Codecov Report

Merging #1254 (eb50733) into master (e8cbeaa) will not change coverage.
The diff coverage is n/a.

❗ Current head eb50733 differs from pull request most recent head b61bc32. Consider uploading reports for the commit b61bc32 to get more accurate results

@@           Coverage Diff           @@
##           master    #1254   +/-   ##
=======================================
  Coverage   71.62%   71.62%           
=======================================
  Files          21       21           
  Lines        1653     1653           
=======================================
  Hits         1184     1184           
  Misses        469      469           

Impacted Files	Coverage Δ
bin/templates/cordova/lib/prepare.js	44.75% <ø> (ø)

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[erisu]

If there no review, I will merge within 12 hours.