4be46419fa
Enable and fix lint prefer_typing_uninitialied_variables Change-Id: Ibb739b21ac8654feef01ecc2aa1c646882b0b749 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/130140 Commit-Queue: Nate Bosch <nbosch@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>