chore: Add new tests for ephemeral focus#649

BenHenning wants to merge 4 commits intoRaspberryPiFoundation:mainRaspberryPiFoundation/blockly-keyboard-experimentation:mainfrom

BenHenning:add-new-tests-for-validating-auto-ephemeral-focus-lost-behaviorsBenHenning/blockly-keyboard-experimentation:add-new-tests-for-validating-auto-ephemeral-focus-lost-behaviorsCopy head branch name to clipboard