Add android as supported platform

Author: Mause

readchar/__init__.py

@@ -11,7 +11,7 @@
 from ._config import config
 
 
-if platform.startswith(("linux", "darwin", "freebsd", "openbsd")):
+if platform.startswith(("linux", "darwin", "freebsd", "openbsd", "android")):
     from . import _posix_key as key
     from ._posix_read import readchar, readkey
 elif platform in ("win32", "cygwin"):