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Reland: Implement delayed event synthesis key event handling for Android #20736
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…for Android (flutter#19024)"" This reverts commit 27cc8d6.
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Description
This re-lands the key event synthesis implementation for Android (Original PR: #19024, Revert PR: #19956). The only difference is sending the synthesized key events to the root view instead of the current view.
Without sending it to the root view, the system doesn't have any chance of handling keys like the back button. The event will still not be sent to the framework twice, since we turn off event propagation while re-dispatching the event.
Related Issues
Tests