[Video] Performance tweaks for Android

[haileyok]

built on #5003

Why

  // On Android, there are some performance concerns if we call `updateActiveViewAsync` too often while scrolling.
  // This isn't really a problem with how `updateActiveViewAsync` works, but rather that it will cause too many
  // ExoPlayer instances to be created and destroyed, which is pretty expensive and can cause some jank in the feed.
  // When comparing to Twitter, it seems they are much more conservative with when videos will begin playback than
  // they are on iOS, likely for the same reason.
  //
  // Because we're going to be calling this far less on Android, we will also be extra careful to make sure some video
  // starts playing when we reach the end of a scroll by calling `updateActiveViewAsync` at the end of a scroll (whether
  // the user ending the drag or the momentum ending). These extra calls will _not_ be excessively expensive, since it
  // is guaranteed to only happen once (React Native will only call either `onEndDrag` or `onMomentumEnd`, not both) and
  // any scroll performance jank will not be noticeable, since the scroll has already completed.

[render]

Your Render PR Server URL is https://social-app-pr-4997.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-cr6foejv2p9s73ck09d0.

[github-actions]

Old size	New size	Diff
7.13 MB	7.13 MB	0 B (0.00%)

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[mozzius]

Looks good, although we do need to get the currentTime indicator back at some point

[mozzius]

Any idea what we need to do to uncomment this? :/

[haileyok]

Yea, I have a plan to fix this today.