When the daemon throws an exception, the receiving client is unable to surface stack traces from the daemon.

This is because it is sent with the `trace` key here:

https://github.com/flutter/flutter/blob/1e8dd1e4d6d70c5e06525bea3fb164a03d7a6c1d/packages/flutter_tools/lib/src/daemon.dart#L308

But the client tries to read it with the `stackTrace` key here:

https://github.com/flutter/flutter/blob/1e8dd1e4d6d70c5e06525bea3fb164a03d7a6c1d/packages/flutter_tools/lib/src/daemon.dart#L343

Thanks to @mraleph for spotting this!

*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*

b/326825892