Bump Xamarin.Google.Android.Material from 1.5.0.2 to 1.6.0 (#7090)

Bumps [Xamarin.Google.Android.Material](https://github.com/xamarin/AndroidX) from 1.5.0.2 to 1.6.0.
- [Release notes](https://github.com/xamarin/AndroidX/releases)
- [Commits](https://github.com/xamarin/AndroidX/commits)

---
updated-dependencies:
- dependency-name: Xamarin.Google.Android.Material
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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eng/AndroidX.targets

@@ -50,7 +50,7 @@
     />
     <PackageReference
         Update="Xamarin.Google.Android.Material"
-        Version="1.5.0.2"
+        Version="1.6.0"
     />
     <PackageReference
         Update="Xamarin.AndroidX.Migration"