Add support for Androidx instead of using support library

[gla5001]

AndroidX will replace the Support Libraries.

AndroidX is the open-source project that the Android team uses to develop, test, package, version and release libraries within Jetpack.

AndroidX is a major improvement to the original Android Support Library. Like the Support Library, AndroidX ships separately from the Android OS and provides backwards-compatibility across Android releases. AndroidX fully replaces the Support Library by providing feature parity and new libraries.

See: https://developer.android.com/jetpack/androidx/

[gla5001]

see PR #355