Updating from 2.28.0 to 2.29.0-dev.0 (#6476)

diff --git a/packages/devtools_app/lib/devtools.dart b/packages/devtools_app/lib/devtools.dart
index c311269..e9415b6 100644
--- a/packages/devtools_app/lib/devtools.dart
+++ b/packages/devtools_app/lib/devtools.dart
@@ -9,4 +9,4 @@
 // the constant declaration `const String version =`.
 // If you change the declaration you must also modify the regex in
 // tools/update_version.dart.
-const String version = '2.28.0';
+const String version = '2.29.0-dev.0';
diff --git a/packages/devtools_app/pubspec.yaml b/packages/devtools_app/pubspec.yaml
index 8550a84..59a13c4 100644
--- a/packages/devtools_app/pubspec.yaml
+++ b/packages/devtools_app/pubspec.yaml
@@ -4,7 +4,7 @@
 
 # Note: this version should only be updated by running tools/update_version.dart
 # that updates all versions of devtools packages (devtools_app, devtools_test).
-version: 2.28.0
+version: 2.29.0-dev.0
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_app
 
@@ -72,7 +72,7 @@
 dev_dependencies:
   args: ^2.4.2
   build_runner: ^2.3.3
-  devtools_test: 2.28.0
+  devtools_test: 2.29.0-dev.0
   fake_async: ^1.3.1
   flutter_driver:
     sdk: flutter
diff --git a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
index 693df99..8527d59 100644
--- a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
+++ b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
@@ -1,33 +1,20 @@
 This is draft for future release notes, that are going to land on
 [the Flutter website](https://docs.flutter.dev/tools/devtools/release-notes).
 
-# DevTools 2.28.0 release notes
+# DevTools 2.29.0 release notes
 
-The 2.28.0 release of the Dart and Flutter DevTools
+The 2.29.0 release of the Dart and Flutter DevTools
 includes the following changes among other general improvements.
 To learn more about DevTools, check out the
 [DevTools overview](https://docs.flutter.dev/tools/devtools/overview).
 
 ## General updates
 
-* Added support for DevTools extensions. This means if you are debugging an app that
-depends on `package:foo`, and `package:foo` provides a DevTools extension, you will
-see a "Foo" tab show up in DevTools that you can use to debug your app. To provide a
-DevTools extension for your pub package, see the getting started guide for 
-[package:devtools_extensions](https://pub.dev/packages/devtools_extensions)!
-
-![Example DevTools extension](images/example_devtools_extension.png "Example DevTools extension for package:foo_package")
-
-* Fixed theming bug in isolate selector - [#6403](https://github.com/flutter/devtools/pull/6403)
-* Fixed multiple isolate bug where main isolate was not reselecting on hot restart. - [#6436](https://github.com/flutter/devtools/pull/6436)
-* Show the hot reload button for Dart server apps that support hot reload -
-[#6341](https://github.com/flutter/devtools/pull/6341)
-* Fixed exceptions on hot restart - [#6451](https://github.com/flutter/devtools/pull/6451), [#6450](https://github.com/flutter/devtools/pull/6450)
-
+TODO: Remove this section if there are not any general updates.
 
 ## Inspector updates
 
-* Fixed bug where inspector service calls were done on the selected isolate, instead of the main isolate - [#6434](https://github.com/flutter/devtools/pull/6434)
+TODO: Remove this section if there are not any general updates.
 
 ## Performance updates
 
@@ -51,13 +38,7 @@
 
 ## Logging updates
 
-* Improved responsiveness of the top bar on the Logging view -
-  [#6281](https://github.com/flutter/devtools/pull/6281)
-
-* Added the ability to copy filtered logs -
-  [#6260](https://github.com/flutter/devtools/pull/6260)
-
-  ![The copy button on the Logging view to the right of the filter tool](images/logger_copy.png "The Logging view copy button")
+TODO: Remove this section if there are not any general updates.
 
 ## App size tool updates
 
@@ -66,4 +47,4 @@
 ## Full commit history
 
 To find a complete list of changes in this release, check out the
-[DevTools git log](https://github.com/flutter/devtools/tree/v2.28.0).
\ No newline at end of file
+[DevTools git log](https://github.com/flutter/devtools/tree/v2.29.0).
diff --git a/packages/devtools_app/release_notes/images/example_devtools_extension.png b/packages/devtools_app/release_notes/images/example_devtools_extension.png
deleted file mode 100644
index 345ed14..0000000
--- a/packages/devtools_app/release_notes/images/example_devtools_extension.png
+++ /dev/null
Binary files differ
diff --git a/packages/devtools_app/release_notes/images/logger_copy.png b/packages/devtools_app/release_notes/images/logger_copy.png
deleted file mode 100644
index fccc3fc..0000000
--- a/packages/devtools_app/release_notes/images/logger_copy.png
+++ /dev/null
Binary files differ
diff --git a/packages/devtools_test/pubspec.yaml b/packages/devtools_test/pubspec.yaml
index 76f247e..40d3336 100644
--- a/packages/devtools_test/pubspec.yaml
+++ b/packages/devtools_test/pubspec.yaml
@@ -7,7 +7,7 @@
 # When publishing new versions of this package be sure to publish a new version
 # of package:devtools as well. package:devtools contains a compiled snapshot of
 # this package.
-version: 2.28.0
+version: 2.29.0-dev.0
 
 repository: https://github.com/flutter/devtools/tree/master/packages/devtools_test
 
@@ -19,7 +19,7 @@
   async: ^2.0.0
   collection: ^1.15.0
   devtools_shared: ^4.0.1
-  devtools_app: 2.28.0
+  devtools_app: 2.29.0-dev.0
   devtools_app_shared:
     path: ../devtools_app_shared
   flutter: