OnScreenClock

Invalid date

v0.5.0j 2019-04-18
==================
* trying to fix overlay permission trouble
* bumped min sdk version from 15 -> 16
* bumped target sdk version from 23 -> 26
* fix crash on Android Oreo and higher when launching clock service at boot time
* fix NPE's when user revokes overlay permission while configuring the clock
* fix admob crash