Add Sample and Run Tests in Google Action Workflow

[mrk-han]

Wouldn't it make sense to run ATF checks as part of the main GHA workflow?

1. Add sample app to ATF
2. Add ATF Checks in 1-3 espresso tests
3. Run Checks in Github Action Workflow

Benefits:

• More thoroughly tests the framework (right now we are just running ./gradlew build
• Demonstrates use of how to add checks
• Also shows how to get ATF checks running with espresso in a "stable" manner on GHA with Standard Github Runners (macOS or Ubuntu)