Remove deprecated TestWindow.platformBrightnessTestValue/TestWindow.clearPlatformBrightnessTestValue (#133178)

Part of: https://github.com/flutter/flutter/issues/133171

Remove deprecated TestWindow.textScaleFactorTestValue/TestWindow.clearTextScaleFactorTestValue (#133176)

Part of: https://github.com/flutter/flutter/issues/133171

Part of https://github.com/flutter/flutter/issues/133171.

Removes from `TestWindow`:
* `localeTestValue`
* `clearLocaleTestValue`
* `localesTestValue`
* `clearLocalesTestValue`
* `initialLifecycleStateTestValue`
* `alwaysUse24HourFormatTestValue`
* `clearAlwaysUse24HourTestValue`
* `brieflyShowPasswordTestValue`
* `defaultRouteNameTestValue`
* `clearDefaultRouteNameTestValue`
* `semanticsEnabledTestValue`
* `clearSemanticsEnabledTestValue`
* `accessibilityFeaturesTestValue`
* `clearAccessibilityFeaturesTestValue`

These properties have reached the end of their deprecation period.

PLUS: clean-up of all the unreachable stuff.

Deprecate BindingBase.window

Reland: Updates `flutter/test/material` to no longer use `TestWindow`

This reverts commit b2fc5f97.

Updates `flutter/test/material` to no longer use `TestWindow`

Reland (3): Removes single window assumptions from `flutter_test`

* Revert "Remove references to BindingBase.window (#122119)"

This reverts commit c7681f00.

* Revert "Remove another reference to BindingBase.window (#122341)"

This reverts commit 6ec44450.

* Revert "Reland (2): Removes single window assumptions from `flutter_test` (#122233)"

This reverts commit eb3d317e.

* Revert "Remove single view assumption from TestViewConfiguration (#122352)"

This reverts commit 927289fb.

* Revert "Updates `flutter/test/cupertino` to no longer use `TestWindow` (#122325)"

This reverts commit 67e17e45.

* Revert "Updates `flutter/test/gestures` to no longer reference `TestWindow` (#122327)"

This reverts commit c2a5111c.

* Revert "Updates `flutter/test/rendering` to no longer use `TestWindow` (#122347)"

This reverts commit 28b65e08.

* Revert "Updates `flutter_localizations/test` to stop using `TestWindow` (#122321)"

This reverts commit 01367d52.

Reland (2): Removes single window assumptions from `flutter_test`

Revert "Reland: Removes single window assumptions from `flutter_test`"

Reland: Removes single window assumptions from `flutter_test`

This reverts commit f2dd19d5.

Removes single window assumptions from `flutter_test`

* Rename WindowPadding to ViewPadding

* dart fix

* typos

* Test that updateSemantics can be called

* Test that updateSemantics in FakeWindow is always implemented

* Sort import directives
Co-authored-by: a-wallen <stephenwallen@google.com>

This reverts commit 63f48d1f.

* Randomize tests, exclude tests that fail with randomization.

* Disable some more tool tests

This reverts commit d056500b.

This reverts commit 31de052e.

This reverts commit e2490f29.

This adds avoid_dynamic_calls to the list of lints, and fixes all instances where it was violated.

Importantly, this lint is NOT turned on for flutter/packages/test, because those changes are happening in another PR: #84478

This reverts usages of the binding's platformDispatcher to use window again temporarily, because there isn't a TestPlatformDispatcher yet, and so some tests were failing because they mocked the TestWindow to return certain things (locales) that were returning the real values instead of the test values.

Once I've created a TestPlatformDispatcher to allow fake data to be passed to it, we can go back to using the platformDispatcher in all of these places