
## Description This re-enables the `SemanticsAction.focus` matchers so that they actually do something now instead of ignoring the action. This was so that we could land the focus action changes without causing breakages in customer tests, and now that customer tests have been updated, we can land this PR turning it on again. ## Related Issues - Fixes https://github.com/flutter/flutter/issues/149842 ## Related PRs - https://github.com/flutter/flutter/pull/149840 ## Tests - Updates semantics tests to actually look for the focus action.