Analyzer: add triple-shift constant test
Analyzer: add triple-shift constant test

Bug: https://github.com/dart-lang/sdk/issues/44908
Change-Id: If510a9aa36fa028e8f91d3cc9dd161282d2db383
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/184701
Reviewed-by: Brian Wilkerson <1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com>
Commit-Queue: Samuel Rawlins <5cf2cac5eec2ad6d0eb2b0f4ff6af9a590ce2bf6@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk