Moving migration guides to the release directory

firebase.json

@@ -101,9 +101,10 @@
       { "source": "/development/add-to-app/android/add-splash-screen", "destination": "/development/platform-integration/android/splash-screen", "type": 301 },
       { "source": "/development/ios-14", "destination": "/development/platform-integration/ios/ios-debugging", "type": 301 },
       { "source": "/development/ios-project-migration", "destination": "/development/platform-integration/ios", "type": 301 },
-      { "source": "/development/packages-and-plugins/androidx-compatibility", "destination": "/development/platform-integration/android/androidx-migration", "type": 301 },
       { "source": "/development/packages-and-plugins/c-interop", "destination": "/development/platform-integration/android/c-interop", "type": 301 },
       { "source": "/development/packages-and-plugins/plugin-api-migration", "destination": "/release/breaking-changes/plugin-api-migration", "type": 301 },
+      { "source": "/development/platform-integration/android/androidx-migration", "destination": "/release/breaking-changes/androidx-migration", "type": 301 },
+      { "source": "/development/platform-integration/android/splash-screen-migration", "destination": "/release/breaking-changes/splash-screen-migration", "type": 301 },
       { "source": "/development/platform-integration/ios-app-clip", "destination": "/development/platform-integration/ios/ios-app-clip", "type": 301 },
       { "source": "/development/platform-integration/platform-views", "destination": "/development/platform-integration/android/platform-views", "type": 301 },
       { "source": "/development/platform-integration/web-images", "destination": "/development/platform-integration/web/web-images", "type": 301 },
@@ -144,6 +145,7 @@
       { "source": "/resources/security-false-positives", "destination": "/reference/security-false-positives", "type": 301 },
       { "source": "/resources/technical-overview", "destination": "/resources/architectural-overview", "type": 301 },
       { "source": "/testing/best-practices", "destination": "/perf/best-practices", "type": 301 },
+      { "source": "/testing/integration-tests/migration", "destination": "/release/breaking-changes/flutter-driver-migration", "type": 301 },
       { "source": "/testing/ui-performance", "destination": "/perf/ui-performance", "type": 301 },
       { "source": "/tutorials/animation", "destination": "/development/ui/animations/tutorial", "type": 301 },
       { "source": "/tutorials/interactive", "destination": "/development/ui/interactive", "type": 301 },

src/_data/sidenav.yml

@@ -183,10 +183,6 @@
               permalink: /development/platform-integration/android/c-interop
             - title: Hosting native Android views
               permalink: /development/platform-integration/android/platform-views
-            - title: AndroidX migration
-              permalink: /development/platform-integration/android/androidx-migration
-            - title: Deprecated Splash Screen API Migration
-              permalink: /development/platform-integration/android/splash-screen-migration
             - title: Restore state on Android **NEW**
               permalink: /development/platform-integration/android/restore-state-android
             - title: Targeting ChromeOS with Android
@@ -370,8 +366,6 @@
     - title: Integration testing
       permalink: /testing/integration-tests
       match-page-url-exactly: true
-    - title: Migrating from flutter_driver
-      permalink: /testing/integration-tests/migration
 
 - title: Performance & optimization
   permalink: /perf

src/development/platform-integration/android/splash-screen.md

@@ -210,5 +210,5 @@ For an example of this, check out the
 [launch screen]: {{site.android-dev}}/topic/performance/vitals/launch-time#themed
 [pre-warming a `FlutterEngine`]: {{site.url}}/development/add-to-app/android/add-flutter-fragment#using-a-pre-warmed-flutterengine
 [Android splash screen sample app]: {{site.github}}/flutter/samples/tree/main/android_splash_screen
-[Deprecated Splash Screen API Migration guide]: {{site.url}}/development/platform-integration/android/splash-screen-migration
+[Deprecated Splash Screen API Migration guide]: {{site.url}}/release/breaking-changes/splash-screen-migration
 [Customizing web app initialization guide]: {{site.url}}/development/platform-integration/web/initialization

src/testing/integration-tests/index.md

@@ -267,6 +267,6 @@ from the command line.
 [`integration_test`]: {{site.repo.flutter}}/tree/main/packages/integration_test#integration_test
 [integration_test usage]: {{site.repo.flutter}}/tree/main/packages/integration_test#usage
 [iOS Device Testing]: {{site.repo.flutter}}/tree/main/packages/integration_test#ios-device-testing
-[Migrating from flutter_drive]: {{site.url}}/testing/integration-tests/migration
+[Migrating from flutter_drive]: {{site.url}}/release/breaking-changes/flutter-driver-migration
 [Running Flutter driver tests with web]: {{site.repo.flutter}}/wiki/Running-Flutter-Driver-tests-with-Web
 [widget tests]: {{site.url}}/testing#widget-tests