+ upgrade to latest android studio, sdk, ndk, cmake, gradle, jdk, etc...
+ upgrade to latest android tools
+ prepare android bundle release
+ uwp hacks (with vcpkg)
+ uwp curl (openssl) fix
+ LICENSE year update to 2021 (really to kick AppVeyor build)
+ android version increased to 0.0.86.17 (72)
+ android external storage access permission removed