Revert ndk.abiFilters, APK version 1.2.2.3

Update prerequisite check in "build_and_release" script

Updated fdroid metadata

- GitLab fdroiddata MR https://gitlab.com/fdroid/fdroiddata/merge_requests/5263

Update APK version to 1.2.2.1

Update SyncthingNative_update_and_build.cmd

Updated README/whatsnew

Update build-syncthing.py

Update APK version to 1.2.0.8

Merge branch 'master' of https://github.com/Catfriend1/syncthing-android

Update README, changelog