Newer versions of the Stitch SDK lead to a critical assertion error, which will block development on certain machines.

Invariants that stdx::this_thread::get_id() == kMainThreadId

Context: if you run initializers in any other thread than the "main thread" (a concept that Stitch doesn't necessarily have), then it would break. This is currently incorrect for dynamically-loaded library implementations.

AC: Fix the invariant: investigate what goes wrong is this invariant isn't met, and then fix the invariant to reflect the totally-correct world.