84648 [flutter_tools] tweak README (tool, cla: yes, waiting for tree to go green)

84659 [flutter_tools] remove mockito from resident web runner tests (tool, cla: yes, waiting for tree to go green)

84662 Clean up podspec template (tool, cla: yes, waiting for tree to go green)

84729 Use -miphonesimulator-version-min when building App.framework for simulator (tool, cla: yes, t: xcode)

84732 [gen_l10n] Make app localizations lookup a public method (tool, a: internationalization, cla: yes, waiting for tree to go green)

84961 Fix typo in test class (tool, cla: yes, waiting for tree to go green)

84967 Fix some indentation (tool, cla: yes, waiting for tree to go green)