[CP] Revert fixed keyboardDismissBehavior on scroll without a drag

[victorsanni]

Issue Link

#160331

Target

stable

Cherry pick PR Link

#161329

Changelog Description

Using ScrollViewKeyboardDismissBehavior.onDrag in a SingleChildScrollView causes text fields to immediately unfocus if the keyboard opening scrolls the text field to keep it visible.

Impacted Users

Apps using text fields in a SingleChildScrollView.

Impact Description

Text fields are unusable within SingleChildScrollView.

Workaround

Disabling ScrollViewKeyboardDismissBehavior.

Risk

low

Test Coverage

yes

Validation Steps

No response

[victorsanni]

cc @justinmc @Piinks

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.