49321 Remove App.framework copy during build ios-framework (a: existing-apps, cla: yes, tool, waiting for tree to go green)

49323 [flutter_tool] Don’t crash when writing to pub stdin fails (cla: yes, tool, waiting for tree to go green)

49325 [web] Serve dart files correctly when running “flutter test” in Chrome (a: tests, cla: yes, platform-web, tool, waiting for tree to go green)

49327 [flutter_tools] Do not use the logcat -T flag on Android versions before Lollipop (cla: yes, tool, waiting for tree to go green)

49329 Guard against a null navigator on popping a route. (cla: yes, framework, waiting for tree to go green)