2928 Fix unguarded availability in Camera plugin (cla: yes)

2929 [device_info] Platform interface added in device_info (cla: yes, waiting for test harness)

2932 fixed url_launcher link in url_launcher_web README  (cla: yes)

2933 [google_maps_flutter_web] First version of the plugin. (cla: yes)

2934 [versions] increase package:platform constraint (cla: yes)

2936 MORE SHARDS MEANS MORE CI (cla: yes)

2938 Revert “[video_player] Set audio mix options (#2922)” (cla: yes)

2939 Reland “[video_player] Set audio mix options (#2922)” (cla: yes)