build(deps): bump Xamarin.AndroidX.AppCompat in /src (#3069)

Bumps [Xamarin.AndroidX.AppCompat](https://github.com/xamarin/AndroidX) from 1.3.1.3 to 1.3.1.4.
- [Release notes](https://github.com/xamarin/AndroidX/releases)
- [Commits](https://github.com/xamarin/AndroidX/commits)

---
updated-dependencies:
- dependency-name: Xamarin.AndroidX.AppCompat
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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