3.15.2 Release

Fixes for Background Location Update, Misleading Email Id Log, Class Detection for Proguard Optimize, ANR on_focus from MainThread, Android 6 API 23 IAM bug

• Fix InterruptedException from background location update #1008
  • InterruptedException was due to a circular initialization of the JobScheduler
  • Avoid reschedule an already scheduled or running service, but instead do it in jobFinished
  • Fix misleading email id log, email id can be null, downgrade log to info level, keep error level for user id
• Modify class detection for proguard optimize
  • Added a method call to prevent it from incorrectly optimizing, class.getName()
• Fix ANR due to on_focus call being called from MainThread
  • All remote calls now get a MainThread check
• Fix bug when showing an IAM on Android 6 API 23 devices #930
  • Elevation must be removed before animating IAM and then added back on animation end