Reverts "Roll pub packages (#145509)" (#145550)

Reverts: flutter/flutter#145509
Initiated by: yusuf-goog
Reason for reverting: Failing builds, blocking tree.
Original PR Author: flutter-pub-roller-bot

Reviewed By: {fluttergithubbot}

This change reverts the following previous change:
This PR was generated by `flutter update-packages --force-upgrade`.

dev/benchmarks/platform_views_layout/pubspec.yaml

@@ -9,7 +9,7 @@ dependencies:
     sdk: flutter
   flutter_driver:
     sdk: flutter
-  google_mobile_ads: 5.0.0
+  google_mobile_ads: 4.0.0
   # To change the version of the gallery assets, edit
   #   //packages/flutter_tools/lib/src/commands/update_packages.dart
   # and run
@@ -89,4 +89,4 @@ flutter:
     - packages/flutter_gallery_assets/people/square/ali.png
     - packages/flutter_gallery_assets/places/india_chettinad_silk_maker.png
 
-# PUBSPEC CHECKSUM: b077
+# PUBSPEC CHECKSUM: 7476

dev/integration_tests/gradle_deprecated_settings/pubspec.yaml

@@ -9,7 +9,7 @@ dependencies:
     sdk: flutter
   camera: 0.10.5+9
 
-  camera_android: 0.10.8+17 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
+  camera_android: 0.10.8+16 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   camera_avfoundation: 0.9.14+1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   camera_platform_interface: 2.7.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   camera_web: 0.3.2+4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -27,4 +27,4 @@ dependencies:
 flutter:
   uses-material-design: true
 
-# PUBSPEC CHECKSUM: dcc4
+# PUBSPEC CHECKSUM: 81c3