Handle async errors in serveRequests calls #1418
Description
Dwds and webdev call serveRequests in multiple places. This API does not run its code in a runZonedGuarded if there is another zone in the call chain, which changes the logic of the calling code. Also, would help diagnose problems if the call was wrapped in Chain.capture to provide all async traces on exception:
See discussion in dart-lang/shelf#202
See similar issue dart-lang/build#3196
See similar issue flutter/devtools#3415