12232 FlutterViewController notify will dealloc (cla: yes)

12233 Revert “Manage iOS contexts separately” (cla: yes)

12234 [glfw/windows] Stops keeping track of input models (cla: yes)

12235 Roll dart to e6887536aadc7fbd1990448989601cee0224958d. (cla: yes)

12249 Editable text fix (affects: text input, cla: yes, platform-web)

12251 Revert “Smooth out iOS irregular input events delivery (#11817)” (cla: yes)

12253 Implement Base32Decode (cla: yes)