* Decrease event loop latency by binding time.monotonic to loop.time directly

This is a small improvment to decrease event loop latency. While the goal is
is to reduce Bluetooth connection time latency, everything using asyncio
is a bit more responsive as a result.

* relo per comments

* fix too fast by adding resolution, ensure monotonic time is patchable by freezegun

* fix test that freezes time too late and has a race loop