Enable Bzlmod for examples/android

[Bencodes]

Gets the examples/android example app building with Bzlmod. Also adding CI jobs for validating the Bzlmod and WORKSPACE paths.

Note: The .bazelversion needs to be on the bleeding edge to work around issues like:

ERROR: /private/var/tmp/_bazel_b/de915eedcd385288ec0f90be4b390488/external/bazel_tools/tools/android/BUILD:446:6: no such target '//external:databinding_annotation_processor': target 'databinding_annotation_processor' not declared in package 'external' defined by /Users/b/Projects/rules_kotlin/examples/android/WORKSPACE (Tip: use `query "//external:*"` to see all the targets in that package) and referenced by '@bazel_tools//tools/android:databinding_annotation_processor'