fuchsia: Disable flaky TimeSensistiveTests (#18656)

https://github.com/flutter/flutter/issues/58211 tracks re-enabling these
tests.
https://dart.googlesource.com/external/github.com/flutter/engine/+/389a59d5dfe9617f8f0da73611f7c8663d27f8e1
1 file changed
tree: 4d38dc6c48632d2effc6f84ef88b0805a31e1314
  1. commits.json