same here, uninstalling Aliendalvik Control 9.3 and Android Support did not help so far. Android support buttons remain greyed, Aliendalvik Control buttons don’t act, and I have flickering black screen now and then.
but BANG after disabling Topmenu Control I get working android support 
using aliendalvik control will trigger a bad flickering.
Uninstalling Android Support via Jolla store left it available in settings… so this did not uninstall, only it’s buttons are grey again.
Is there a foolproof way to really uninstall Android App support completely?
well, the brutal way to remove all android stuff
https://jolla.zendesk.com/hc/en-us/articles/360015459134
goes like this…
devel-su
rm -rf /home/.android/*
rm -rf android_storage
reboot
after that I re-flashed SailfishOS 3.3. It did not work.