Fixes: #130793

Updated tests in dev, examples/api, and tests/widgets to ensure that
they continue to pass when the default for `ThemeData.useMaterial3` is
changed to true.

This is the final set of changes required for
https://github.com/flutter/flutter/issues/127064.

Relocate some tests from scrollable_test.dart 

Clean up scrollable.dart for 2D

Make ClampingScrollSimulation ballistic and more like Android

* Fix typos

* lowercase animated & opacity

* Undo typo fix

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Co-authored-by: Michael Goderbauer <goderbauer@google.com>

* Fix scrollable to clear inner semantics node if it does not use two panel

* g

* add more check

* Maybe maybe

* Nit

* One more nit

* ++

* Fix test

* REview feedback

* Add comment about ios

* ++

* Doc nit

* Handle trackpads

* Review feedback

* Reland "Adds API in semanticsconfiguration to decide how to merge child semanticsConfigurations (#110730)"

This reverts commit 7549925c.

* makes markNeedsSemanticsUpdate more robust

* address comment

Revert "Adds API in semanticsconfiguration to decide how to merge child semanticsConfigurations (#110730)" (#116839)

This reverts commit 352ad3a9.

* Adds semantics merger API and fix input decorator

* addressing comments

* abstractnode to object

* feature complete

* addressing comments

* fix comments

* conditionally add sort order

* fix bool

* fix test

* more fix

* fix tests

* Use `curly_braces_in_flow_control_structures` for `widgets`

* fix comments

* fix comments

This reverts commit baa45a17.

This reverts commit 000f4d15.

This reverts commit 5fd259be.

This reverts commit 5f792ba1.