Bump external/xamarin-android-tools from 2609c38 to 8722663 (#10540)

Bumps [external/xamarin-android-tools](https://github.com/dotnet/android-tools) from `2609c38` to `8722663`.
- [Commits](dotnet/android-tools@2609c38...8722663)

---
updated-dependencies:
- dependency-name: external/xamarin-android-tools
  dependency-version: 87226632ff5eaa27461a30bda4dda37642491415
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]