`assert(app is IOSApp)` fails if `app` is null, and `app` is an
optional argument. `app` is passed to `_IOSSimulatorLogReader`, which
already handles it being null.

Workaround for cached web builds with --[no-]track-widget-creation flags.
Similar PR: #23299

This reverts commit 053c3881.

* c2c6ad93b Roll src/third_party/skia 41e377d1baf0..3d311a983bf0 (9 commits) (flutter/engine#18150)

* a0983d36f [web] Add support for ColorFilter on images (flutter/engine#18111)

* 905836d46 [web] Upgrade the test package to remove the dependency on package_resolver (flutter/engine#18135)

* 0645e9313 Manually add dependency for shelf_proxy (flutter/engine#18151)

* d104f876a Roll src/third_party/skia 3d311a983bf0..0cbd58766ace (2 commits) (flutter/engine#18152)

* b1b1df039 Roll fuchsia/sdk/core/mac-amd64 from ERGnT... to c5NQZ... (flutter/engine#18155)

* 8a8cd5d6f Roll src/third_party/dart 7bb38670d279..1ef444139c4c (22 commits) (flutter/engine#18161)

* c1068dec0 gpu_metal_surface `submitframe` return false when canvas is null (flutter/engine#18154)

* cf13c7f7c [iOS platform view] fix active_composition_order_ never cleared (flutter/engine#18153)

* 805a8874c Add first Linux shell tests (flutter/engine#18159)

* 80c090d9e Fix path bounds for multiple rects. Implement winding rules (flutter/engine#18165)

* 15752ee41 Roll src/third_party/skia 0cbd58766ace..e1c0cb3de8ab (8 commits) (flutter/engine#18167)

* c1bd64a30 Roll src/third_party/skia e1c0cb3de8ab..1e8fb04b29b9 (3 commits) (flutter/engine#18168)

* 6a379cc2f Roll fuchsia/sdk/core/linux-amd64 from gnNdl... to RpHTv... (flutter/engine#18171)

* 961fa1483 Roll src/third_party/dart 1ef444139c4c..8c8249fa0123 (11 commits) (flutter/engine#18172)

* 337ec63cc Roll src/third_party/skia 1e8fb04b29b9..c5727d8e34d2 (1 commits) (flutter/engine#18173)

* bc30355ff Roll src/third_party/skia c5727d8e34d2..999257d870d7 (5 commits) (flutter/engine#18174)

* c3cd83baf Roll fuchsia/sdk/core/mac-amd64 from c5NQZ... to jMJqf... (flutter/engine#18175)

* Updated bin/internal/fuchsia-linux.version

* Updated bin/internal/fuchsia-mac.version

This reverts commit 9ee6763a.

Added and example to the ListView docs that shows how to have a custom UI for an empty list.

Fixes #55765

We are currently only returning the first device from dev-finder, instead we need to look at the whole list.