[native] Memoize ConnectedRemoteImage

Summary:
Similar to D9213, the profiler isn't providing much information here so I'm memoizing this on a whim to see if anything changes. Doubt this changes anything at all.

Depends on D9213

Test Plan: ConnectedRemoteImage continues to look as expected.

Reviewers: ginsu, tomek, rohan

Reviewed By: rohan

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9214