82941 [flutter_tools] allow passing properties directly to Gradle (tool, cla: yes, waiting for tree to go green)

82970 [flutter_tools] fix integration test flake (tool, cla: yes, waiting for tree to go green)

82991 Add MultiRootFileSystem to better support using –filesystem-root. (tool, cla: yes, waiting for tree to go green)

83067 Add Gradle lockfiles and tool to generate them (team, tool, a: accessibility, cla: yes, d: examples, waiting for tree to go green)

83073 [flutter_tools] migrate artifacts to null safety (tool, cla: yes, waiting for tree to go green)

83122 import pkg:intl when DateFormat or NumberFormat is used (tool, cla: yes, waiting for tree to go green)