29461 Remove explicit frame schedule (cla: yes, tool)

29463 Make real JSON in arb (cla: yes, f: cupertino, framework)

29467 prevent stream notifications from interfering with reload (a: tests, cla: yes, team)

29469 fix asset reloading (cla: yes, tool)

29474 Let CupertinoTextField’s clear button also call onChanged (cla: yes, f: cupertino, framework, waiting for tree to go green)

29494 initial work on coverage generating script for tool (cla: yes, tool)

29499 Set custom flutter_assets by add FLTAssetsPath to AppFrameworkInfo.plist (cla: yes, tool, waiting for tree to go green)

29528 Ensure that assumed formatting of properties file is correct (cla: yes, tool)