Replace more references to `flutter/engine` with `flutter/flutter` (#182654)

towards #167478

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [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].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [ ] I updated/added relevant documentation (doc comments with `///`).
- [ ] 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.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

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<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
diff --git a/dev/devicelab/bin/tasks/hello_world_impeller.dart b/dev/devicelab/bin/tasks/hello_world_impeller.dart
index 2486de3..7bfcaea 100644
--- a/dev/devicelab/bin/tasks/hello_world_impeller.dart
+++ b/dev/devicelab/bin/tasks/hello_world_impeller.dart
@@ -43,7 +43,7 @@
         isUsingValidationLayers = true;
       }
       // "ImpellerValidationBreak" comes from the engine:
-      // https://github.com/flutter/engine/blob/4160ebacdae2081d6f3160432f5f0dd87dbebec1/impeller/base/validation.cc#L40
+      // https://github.com/flutter/flutter/blob/91b2d41a66d1c540233b819525553afc0fa1f58d/engine/src/flutter/impeller/base/validation.cc#L54
       if (data.contains('ImpellerValidationBreak')) {
         hasValidationErrors = true;
       }
diff --git a/docs/engine/impeller/Flutter-GPU.md b/docs/engine/impeller/Flutter-GPU.md
index dc0d1e8..33937d4 100644
--- a/docs/engine/impeller/Flutter-GPU.md
+++ b/docs/engine/impeller/Flutter-GPU.md
@@ -32,7 +32,7 @@
 
 - [Project dashboard](https://github.com/orgs/flutter/projects/134/views/1)
 - [Original design doc](https://flutter.dev/go/impeller-dart) (now outdated!)
-- [flutter_gpu package source](https://github.com/flutter/engine/tree/main/lib/gpu)
+- [flutter_gpu package source](https://github.com/flutter/flutter/tree/main/engine/src/flutter/lib/gpu)
 
 ## Dart FFI
 
diff --git a/docs/platforms/android/Texture-Layer-Hybrid-Composition.md b/docs/platforms/android/Texture-Layer-Hybrid-Composition.md
index 670494a..9219177 100644
--- a/docs/platforms/android/Texture-Layer-Hybrid-Composition.md
+++ b/docs/platforms/android/Texture-Layer-Hybrid-Composition.md
@@ -8,7 +8,7 @@
 
 # Approach
 
-TLHC uses a [custom `FrameLayout`](https://github.com/flutter/engine/blob/7025645c52bfaeb1cc67be5ca842b65772c89c8e/shell/platform/android/io/flutter/plugin/platform/PlatformViewWrapper.java#L35-L46), which is placed in the native view hierarchy as normal, but [redirects drawing](https://github.com/flutter/engine/blob/7025645c52bfaeb1cc67be5ca842b65772c89c8e/shell/platform/android/io/flutter/plugin/platform/PlatformViewWrapper.java#L299-L309) to a canvas that backs a Flutter [`Texture`](https://api.flutter.dev/flutter/widgets/Texture-class.html) in order to compose with the rest of the Flutter UI as normal (without the layering and threading complexities of Hybrid Composition).
+TLHC uses a [custom `FrameLayout`](https://github.com/flutter/flutter/blob/91b2d41a66d1c540233b819525553afc0fa1f58d/engine/src/flutter/shell/platform/android/io/flutter/plugin/platform/PlatformViewWrapper.java#L29-L39), which is placed in the native view hierarchy as normal, but [redirects drawing](https://github.com/flutter/flutter/blob/91b2d41a66d1c540233b819525553afc0fa1f58d/engine/src/flutter/shell/platform/android/io/flutter/plugin/platform/PlatformViewWrapper.java#L178-L187) to a canvas that backs a Flutter [`Texture`](https://api.flutter.dev/flutter/widgets/Texture-class.html) in order to compose with the rest of the Flutter UI as normal (without the layering and threading complexities of Hybrid Composition).
 
 # Limitations
 
diff --git a/engine/src/flutter/tools/gradle/README.md b/engine/src/flutter/tools/gradle/README.md
index 54207a1..9001892 100644
--- a/engine/src/flutter/tools/gradle/README.md
+++ b/engine/src/flutter/tools/gradle/README.md
@@ -30,7 +30,7 @@
 1. Authenticate with CIPD by running `cipd auth-login`.
 2. Run `cipd create -in gradle-7.5.1 -install-mode copy -tag version:7.5.1 -name flutter/gradle` to
 upload the new Gradle version to CIPD.
-3. Update the `engine/src/flutter/DEPS` Gradle entry (which should look something like [this](https://github.com/flutter/engine/blob/4caaab9f2502481b606b930abeea4a361022fa16/DEPS#L732-L743))
+3. Update the `DEPS` Gradle entry (which should look something like [this](https://github.com/flutter/flutter/blob/91b2d41a66d1c540233b819525553afc0fa1f58d/DEPS#L573))
 to contain the tag from the command above (version:7.5.1).
 4. Run `gclient sync` to verify that the dependency can be fetched.