[lib] Introduce new `sendMultimediaMessage` and consume in `native`
88eabcde44a5
Actions

Description

[lib] Introduce new sendMultimediaMessage and consume in native

Summary:
Introduce a new sendMultimediaMessage in lib/actions/message-actions that hits the create_multimedia_message endpoint with the updated payload (mediaMessageContents instead of mediaIDs).

This endpoint is consumed by input-state-container on native, but not on web. We continue to use the legacySendMultimediaMessage on web to avoid breaking things.

IMPORTANT: While the changes made to keyserver in this stack are backwards compatible, this change to native depends on keyserver being deployed before a release is made. To keep things simple I'll avoid landing this diff until all necessary changes on the keyserver side are made and tested. I'll hold back on landing this diff (and a few others) until we decide to "flip the switch." I'll probably just keep this commit in my local environment as I'm working, but figured it might be helpful for reviewers if they wanted to arc patch or test any part of the stack in their local dev environment.

(As of this diff, the keyserver has everything it needs in multimediaMessageCreationResponder(...) to properly associate uploads with media with messages)

Depends on D5062

Test Plan: