Fixes https://github.com/flutter/flutter/issues/156793
### Issue Link:
https://github.com/flutter/flutter/issues/156793
### Changelog Description:
Fix flaky crash when targeting web applications via IDEs using the DAP.
### Impact Description:
The `flutter debug-adapter` process started by IDEs can crash when requesting isolate information from a Flutter web application that has disposed its isolate (i.e., at shutdown or due to a hot restart).
This is the top crasher for `flutter_tools`, accounting for ~66% of all crashes for 3.32.0.
### Workaround:
Is there a workaround for this issue?
No.
### Risk:
This CP is low risk as only additional exception handling was added to the DAP logic in `package:dds` (see https://dart-review.googlesource.com/c/sdk/+/431060) to handle the specific case outlined in the issue.
### Test Coverage:
This issue is difficult to reproduce without injecting test-only code via custom VM service RPCs across multiple repositories. Testing was done manually with this approach, but the testing code is not committed.
### Validation Steps:
IDE extensions don't crash when interacting with Flutter Web applications during hot restart / application shutdown.
80f085c97d