IMPORTANT: MAKE SURE TO UPDATE `CODEVERSION` BEFORE LANDING
Now that we have video messages working end-to-end, we can "flip the switch" to enable video messages.
Specifically:
1. Set `serverCanHandle` to `true` for video types in `lib/media/file-utils`
2. Set versionCode for `hasMinCodeVersion` check in `multimedia-message-spec` to 148
3. Add `MediaLibrary.MediaType.video` to `mediaType` array in `multimedia-gallery-keyboard.react` so users can select videos from their media gallery
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Depends on D5240