[flutter_tools] Guard socket streams and done futures against socket reset errors

[bkonyi]

When remote peers abruptly terminate or reset network connections, POSIX event handlers (such as epoll) trigger low-level socket reset errors (SocketException: Error event raised in event handler : error condition has been reset, port = 0) via _NativeSocket.multiplex.

If these socket error events occur on streams or sink done futures that lack error handlers, or when adding to/closing sinks in an error state, the unhandled exception escapes into the Zone and causes Flutter tool crashes.

This change:

• Introduces FutureErrorHandling<T> in packages/flutter_tools/lib/src/base/common.dart to provide a reusable .handleError(...) extension on Future for background futures without requiring empty (_) {} callbacks.
• Guards createVmServiceDelegate channel streams, sink done futures, and sink operations against SocketException.
• Guards DaemonStreams.fromSocket, DaemonStreams.connect, and daemon server socket.done and socket.addStream futures.
• Adds onError handling to ProxiedPortForwarder forwarded socket streams.
• Adds onError handling to ResidentRunner log streams.
• Adds error handling to AndroidConsole socket done future on connect and destroy.
• Adds unit tests for FutureErrorHandling.handleError (including test predicate filtering) and regression tests verifying that socket stream and done future errors do not crash the tool.

Fixes #192935

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement].
• I signed the [CLA].
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is [test-exempt].
• I followed the [breaking change policy] and added [Data Driven Fixes] where supported.
• All existing and new tests are passing.

[gemini-code-assist]

Code Review

This pull request introduces a custom FutureErrorHandling extension on Future to handle errors on background sink and socket completion futures, applying it across several files and adding corresponding unit tests. The code review suggests removing this custom extension entirely to avoid unnecessary complexity and potential confusion, recommending instead the use of standard Dart APIs like catchError or then().catchError() at the call sites, along with removing the associated unit tests and imports.

[camsim99]

Looks reasonable to me!

[bkonyi]

Thanks @camsim99! 😁