[native] Add some memoization to InnerTextMessage component

Summary:
Was able to reduce re-renders with some memoization.

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Depends on D9054

Test Plan:
Before:

After:

You can observe that we don't render anything nested within InnerTextMessage

Reviewers: ginsu, tomek, rohan

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9055