[native] Skip onInitialAppLoad if usingCommServicesAccessToken

Summary:
This handles part of ENG-5940 (appStartReduxLoggedInButInvalidCookie and appStartCookieLoggedInButInvalidRedux).

In the old format, currentUserInfo and the cookie from my keyserver should always be in sync. In the multi-keyserver world, currentUserInfo is sourced from Comm services while cookie is keyserver-specific, so there is no issue when the two are out-of-sync.

If a keyserver is logged out when we have a CSAT, the keyserver connection handlers will handle it by logged the user into the keyserver using the Olm auth responder (assuming there isn't a permanent connectionIssue).

We'll have a somewhat similar issue with currentUserInfo and the CSAT potentially being out-of-sync. This will be handled separately; will make a comment on ENG-5798 to discuss this further, but it looks like it's meant to be part of ENG-4332.

Test Plan: Not sure how to test this one. Flow checks out

Reviewers: inka, varun, tomek

Reviewed By: inka

Differential Revision: https://phab.comm.dev/D10575