[native] Use connectivity status for images upload

Summary:
Instead of using authoritative keyserver connection status use network connectivity status.

https://linear.app/comm/issue/ENG-5774/update-encryptedimage-remoteimage-component

Depends on D11196

Test Plan: Disconnect from Wi-Fi, start an upload, connect - check if a retry was attempted (it doesn't succeed because of NetInfo inaccuracy - it sometimes reports disconnected status when Wi-Fi is connected).

Reviewers: atul, inka, kamil

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D11197