The google play store will require 31, starting 2022-11 (next month).
A few commits are cherry-picked onto our forks of p4a and buildozer
from upstream, but the forks are not rebased.
Note that the compileSdkVersion is kept at 30,
only the targetSdkVersion is bumped 30->31.
closes https://github.com/spesmilo/electrum/pull/8010
I am trying to upstream some relevant p4a and buildozer changes
in e.g. https://github.com/kivy/python-for-android/pull/2686
0efc8815a4