29860 Move binarySearch to foundation. (cla: yes, framework)

29861 Wrap Timeline calls in assert for material/about.dart (cla: yes)

29883 Watch wildcard directories in addition to asset bundle (cla: yes, tool)

29885 ensure packages file is updated when using build_runner (cla: yes, tool)

29908 Update Twitter handle @flutterio -> @FlutterDev (cla: yes, team, team: gallery)

29928 Limit the semantic nodes ID range to 2^16 (cla: yes, framework)

29929 Remove tranparent paint hack from BackdropFilter (cla: yes, framework)

29938 Pass FLUTTER_TOOL_ARGS to snapshot command. (cla: yes, tool)