dart sdk roll breaks cocoon via transitive dep uuid_enhanced #82072
Description
The validate_ci_yaml test broke on the engine roll #82070 because a transitive dependency (uuid_enhanced, depended on by graphql) extended an UnmodifiableUint8ListView, which is no longer permitted by https://dart.googlesource.com/sdk.git/+/3e9cdc56440bded76d8078a2567910236ad6f7b9%5E%21/#F1
../../../x/w/.pub-cache/hosted/pub.dartlang.org/uuid_enhanced-3.0.2/lib/uuid.dart:9:7: Error: 'UnmodifiableUint8ListView' is restricted and can't be extended or implemented.
class Uuid extends UnmodifiableUint8ListView {
^
To clarify, the validate_ci_yaml script does not require graphql; however, the cocoon service itself DOES, so landing this change would probably would lead to cocoon being unable to build with the latest Flutter. I am not sure why customer_testing did not fail.