Changes for making options menu work

[t-arn]

This PR enables Toga to use the options menu of Android.

It is needed for following Toga PR: https://github.com/beeware/toga/pull/1353

PR Checklist:

• [x] All new features have been tested
• [ ] All new features have been documented
• [x] I have read the CONTRIBUTING.md file
• [x] I will abide by the code of conduct

[t-arn]

@freakboy3742 Please review this PR

[t-arn]

@freakboy3742 I removed the VERSION from the project declaration, but did not test it - please check carefully