Windows: Revert https://github.com/flutter/engine/pull/24428

[clarkezone]

Fix flutter/flutter#76465 which was introduced by #24428. This is not an exact revert, it preserves the WinUWP fix aspect.

North star for Windows resizing is flutter/flutter#79427

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[flutter-dashboard]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat.

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[cbracken]

For future archaeologists, this gets the win32 embedder back to a good state while preserving the state of the UWP embedder until a full fix across both can be landed. That will require some changes to ANGLE. This change has the effect of putting #24705 temporarily on hold until the long-term solution is in place.

[knopp]

I tested this and it seems to work well.