plugin android: use XEP-0352 to indicate (in)active state: Client State Indication plugin is used to set state when pause/resume is called. The state is changed on pause only after a delay (currently 30s), to avoid changing state if use is only checking something quickly on an other app.

# XXX: the Monkey Patch is here and not in src/__init__ to avoir issues with pyjamas compilation
# TODO: remove this when changes are merged in Wokkel
from sat_tmp.wokkel import install
install()