While attempting to reproducibly build the qml android apk, one of the differences
was due to the "frozenlist" dependency (pulled in by aiohttp) - the compiled C parts
were not deterministic. By setting this env var, we can opt-out [0] of all the C
accelerated parts and just use the pure-python implementation. We are already doing
the same for other aiohttp-related packages anyway.
[0]: c2794cac12/setup.py (L7)
bb0db0e3c0