88042 Fix incorrect logging. (tool, cla: yes, waiting for tree to go green)

88061 Update the timeouts since tests time out after 15 minutes not 30 seconds (tool, cla: yes, waiting for tree to go green)

88074 Update flutter create templates for Xcode 13 (platform-ios, tool, platform-mac, cla: yes, waiting for tree to go green, t: xcode)

88076 Support flutter create –platform singular flag (tool, cla: yes, waiting for tree to go green)

88081 feat: migrate windows/application_package.dart to null-safety (tool, cla: yes, waiting for tree to go green)

88095 feat: migrate fuchsia/application_package.dart to null-safe (tool, cla: yes, waiting for tree to go green)