3626 [device_info] null safety stable  (cla: yes, nnbd, p: device_info)

3627 [wifi_info_flutter] null safety stable (cla: yes, nnbd, p: wifi_info_flutter)

3628 [google_sign_in_web] Migrate to null-safety (cla: yes, nnbd, p: google_sign_in, platform-web, waiting for tree to go green)

3629 [cross_file] Fix base class nullability (cla: yes, p: cross_file)

3630 [file_selector] Return a non-null value from getSavePath on web (cla: yes, p: file_selector, platform-web, waiting for tree to go green)

3631 [file_selector] Migrate to null safety (cla: yes, nnbd, p: file_selector)