[Tango->FCM] Trigger sync by calling TriggerRefresh and not by sending fake invalidations.

Instrumentation test were triggering Sync by sending fake invalidations via:

*  InvalidationServiceFactory.getForProfile(Profile.getLastUsedProfile())
                        .requestSyncFromNativeChromeForAllTypes();

This approach doesn't work with new implementation.

BUG=801985, 943111

Change-Id: I86d72330ec35c824de3ed94f6b6b83738bc583e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1533777
Commit-Queue: Tatiana Gornak <melandory@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644221}
4 files changed