Bruno Leroux 4b5c993fe4 [Web] Ignore invalid keyboard events related to autofill (flutter/engine#50590)
## Description

This PR fixes an 'Unexpected null value' error related to autoFill.
When using Autofill feature, Chrome emits keyboard events whose `event.code` and `event.key` are null.

## Related Issue

Fixes https://github.com/flutter/flutter/issues/114620.

## Tests

Adds 1 test.
2024-02-16 07:04:48 +00:00
Languages
Dart 75%
C++ 16.5%
Objective-C++ 2.9%
Java 2.8%
Objective-C 0.7%
Other 1.9%