internal b/153030038

The floating label for the outlined TextField widget is too low and doesn't match Material design, please see https://dartpad.dev/bf25d5a76c0bc8a318d5f83ff375bbf6 for the reproduction case.

Marking as critical as it is causing the app to fail MD review.