* Revert "Create template splash screens for Android and iOS (#11505)"

This reverts commit 1ad4a088.

* Revert "Roll engine (#11619)"

This reverts commit ea78f448.

* roll

* kick the tests again

* Revert "kick the tests again"

This reverts commit 4480a02ce2d60e66ad0ca8ac5a2029f84f9b71d9.

* Bump Dart SDK to 1.25.0-dev.9.0

* add link to sdk bug

Roll engine in order to fix regression of AOT snapshot build time.

* roll

* no-op commit

* revert no-op

This reverts commit bc4a3f17.

Required for https://github.com/flutter/flutter/pull/11282

Roll engine to "Speculatively disable GN argument 'enable_profiling' to test its effect on benchmarks." (#11303)

* work around for appveyor connectivity issues

Unfortuantelly, this slows down our build :(

* review feedback

Fixes https://github.com/flutter/flutter/issues/11238

Update --local-engine to account for changed host architecture of 32-bit Android debug builds. (#11263)

Roll engine to 03e642bc8940441bbad5c2fb7d3ca868c1fdad54.

Revert "Update --local-engine to account for changed host architecture of 32-bit Android debug builds. (#11251)" (#11259)

This reverts commit 3f514fcf.

Update --local-engine to account for changed host architecture of 32-bit Android debug builds. (#11251)

Roll engine to 7480e32854606e554ae37f8bd241c050bdc565c4.

* Revert "test missed a mock (#11098)"

This reverts commit 1a01de9a.

* Revert "Roll engine to 9117705b3653565a240314481c63eb93090f7232 (#11114)"

This reverts commit 12b39528.

(Needs https://github.com/dart-lang/sdk/issues/28519)

Picks up primarily stability fixes.

https://github.com/flutter/flutter/issues/10650