* Revert "Mark last failing test after gradle update as flaky. (#91423)"
This reverts commit 46a52d03bddc74a78135d39ef2084503cc2156d7.
* Revert "fix android template for Gradle 7 (#91411)"
This reverts commit 51d06d537fe37dd8f42002346d8545a489aed427.
* Revert "Add explicit version for mac and windows openjdk. (#91408)"
This reverts commit bf429f2771f486602579bd5ff85ee2cfbb0794af.
* Revert "Update the openjdk version used by linux android tests. (#91405)"
This reverts commit 2144ab8b45b8da12a94838b092c8ebc62085457f.
* Revert "Migrate to Gradle 7.0.2 / AGP 7.0.1 (#90642)"
This reverts commit b6459f9b633279f84a92eabc6bc5f82304fc1eae.
This adds a smoke test for every single API example. It also fixes 17 tests that had bugs in them, or were otherwise broken, and even fixes one actual bug in the framework, and one limitation in the framework.
The bug in the framework is that NetworkImage's _loadAsync method had await response.drain<List<int>>();, but if the response is null, it will throw a cryptic exception saying that Null can't be assigned to List<int>. The fix was just to use await response.drain<void>(); instead.
The limitation is that RelativePositionedTransition takes an Animation<Rect> rect parameter, and if you want to use a RectTween with it, the value emitted there is Rect?, and one of the examples was just casting from Animation<Rect> to Animation<Rect?>, which is invalid, so I modified RelativePositionedTransition to take a Rect? and just use Rect.zero if the rect is null.
