[flutter_tools] Bundle data assets from hooks in flutter test - #193435

…mpty (flutter#193434)

When `flutterManifest.isEmpty` (for example, a `pubspec.yaml` without a
`flutter:` section), `ManifestAssetBundle.build` previously returned
early with an empty `AssetManifest.bin`, ignoring any data assets
produced by build/link hooks (`flutterHookResult.dataAssets`).

Bug:

* flutter#146264

### Changes
- Only short-circuit with an empty manifest in
`ManifestAssetBundle.build` when both `flutterManifest.isEmpty` and
`flutterHookResult?.dataAssets.isEmpty ?? true`.
- Skip `computeTransitiveDependencies` when `flutterManifest.isEmpty`.
- Add a unit test in `asset_bundle_test.dart` verifying that data assets
from hooks are bundled when `pubspec.yaml` is empty.

### PR Stack
| # | PR | Branch | Commit |
| :-: | :--- | :--- | :--- |
| **1** | **👉 flutter#193434 (this PR)**
| `data-assets-empty-pubspec` |
flutter@62199c4
|
| 2 | flutter#193435 |
`data-assets-flutter-test` |
flutter@25be1ab
|
| 3 | flutter#193436 |
`data-assets-dev-dependencies-release-test` |
flutter@79abad9
|
| 4 | flutter#193437 |
`data-assets-widget-preview` |
flutter@98f1001
|

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [AI contribution guidelines] and understand my
responsibilities, or I am not using AI tools.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant in-code documentation (doc comments with
`///`).
- [x] If this PR introduces a new feature or capability, I created and
linked a website documentation issue or PR in [flutter/website] (or
verified none is needed).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

…13104)

Manual roll requested by [email protected]

flutter/flutter@d649d2b...e89fd0a

2026-10-01 [email protected] Manual roll ICU from 6ebb40c59477 to 5aa526207171 (2 revisions) (flutter/flutter#193661)
2026-10-01 [email protected] fix(web): hash source maps before rewriting sourceMappingURL with --web-content-hash (flutter/flutter#193614)
2026-10-01 [email protected] [flutter_tools] Bootstrap DeviceManager in ToolDependencies (flutter/flutter#193524)
2026-10-01 [email protected] [wasm] Set flutter_runtime_mode in tools/gn to_gn_wasm_args (flutter/flutter#193407)
2026-10-01 [email protected] Remove remaining `download_jdk` references (flutter/flutter#193562)
2026-10-01 [email protected] Synchronize dart2wasm feature probes in roll script and flutter_bootstrap.js (flutter/flutter#193271)
2026-10-01 [email protected] [web] Unskip web tests that now pass in gestures, services, and widgets (flutter/flutter#193512)
2026-10-01 [email protected] Roll Fuchsia Test Scripts from whZAV1mfT-Rdc0rQ8... to fCNknap4ZI0AMcvIf... (flutter/flutter#193640)
2026-10-01 [email protected] Roll Skia from 0575a37d0619 to f2d68e0b8863 (2 revisions) (flutter/flutter#193621)
2026-10-01 [email protected] perf(widgets): use const <Never>{} in InheritedModelElement and avoid redundant casts in RenderObjectElement.update (flutter/flutter#192913)
2026-10-01 [email protected] [web] Unskip and strengthen missing glyph tofu test on Wimp (flutter/flutter#193426)
2026-10-01 [email protected] [flutter_tools] Fix `flutter drive -d chrome` hanging on web (flutter/flutter#193459)
2026-10-01 [email protected] [web] Fix hang when Chromium cannot bind remote debugging port (flutter/flutter#193461)
2026-10-01 [email protected] [flutter_tools] Bundle data assets from hooks in flutter test (flutter/flutter#193435)
2026-10-01 [email protected] Roll Packages from 0ba9a82 to d5ec6db (11 revisions) (flutter/flutter#193641)
2026-10-01 [email protected] Revert: [flutter_tools] Fix DTD "Stream already subscribed" error and wait for analysis over DTD in widget preview (flutter/flutter#193637)
2026-10-01 [email protected] Roll Skia from 6182a3cf8f98 to 0575a37d0619 (5 revisions) (flutter/flutter#193613)
2026-10-01 [email protected] [flutter_tools] Fix DTD "Stream already subscribed" error and wait for analysis over DTD in widget preview (flutter/flutter#192930)
2026-09-30 [email protected] [Impeller] Sample the render target rect in offscreen advanced blends (flutter/flutter#192988)
2026-09-30 [email protected] Roll Skia from 01524014dff5 to 6182a3cf8f98 (11 revisions) (flutter/flutter#193594)
2026-09-30 [email protected] [web] Use Xvfb -displayfd and clean up Xvfb after Firefox test suites (flutter/flutter#193510)
2026-09-30 [email protected] Fixes bug where sibling node fail to update size (flutter/flutter#191220)
2026-09-30 [email protected] Roll Skia from c7b323126bf0 to 01524014dff5 (3 revisions) (flutter/flutter#193577)
2026-09-30 [email protected] Remove some Undefined Behavior from run_customer_testing_tests.dart. (flutter/flutter#193582)
2026-09-30 [email protected] Fix pointer id/coordinate mismatch in Android platform view multi-touch (flutter/flutter#191631)
2026-09-30 [email protected] Roll Packages from 3c6ce59 to 0ba9a82 (11 revisions) (flutter/flutter#193578)
2026-09-30 [email protected] Fix unresolved doc comment references in dev/ tooling (flutter/flutter#193501)

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