Remove Event.wrapper for autoplay telemetry

[mcarare]

Breakout from #21292.

┆Issue is synchronized with this Jira Task

[sflorean]

Verified as fixed on Nightly 4/ 18 with OnePlus 9 (Android 12).

  {
         "timestamp": 26356,
         "category": "autoplay",
         "name": "setting_changed",
         "extra": {
           "autoplay_setting": "block_audio"
         }
       },
       {
         "timestamp": 27222,
         "category": "autoplay",
         "name": "setting_changed",
         "extra": {
           "autoplay_setting": "block_cellular"
         }
       },
       {
         "timestamp": 28064,
         "category": "autoplay",
         "name": "setting_changed",
         "extra": {
           "autoplay_setting": "allow_all"
         }
       },
       {
         "timestamp": 29819,
         "category": "autoplay",
         "name": "setting_changed",
         "extra": {
           "autoplay_setting": "block_all"
         }