3.9.1 Release

Proguard, FCM Auth, Location, & Misc Fixes

• Fixed issue with latest Proguard causing FCM and Android Support library report as not found.
  • Issue #533
• FCM init error when the Firebase Auth library was added to the project. PR #530
• Fixed GoogleAPIClient not connected yet errors. Issue #509
• Android 7.0 Bad Notification: Couldn't expand RemoteViews for: StatusBarNotification
  • Restore on app update disabled to fix issue #263
• NPE on flushBufferToDisk. Issue #513
  • Fix did not resolve issue, was fully fixed in 3.9.2