I'm having a nasty issue with your Unity Android Plugin.
Whenever I call PlayFabAndroidPlugin.Init("<mySenderID>"); I get a crash and literally no debug messages at all in my adb logcat!
This happens if I login first with PlayFabClientAPI.LoginWithAndroidDeviceID or not, makes no diff!
I'm running on a LGV40010a02e06 (as per adb devices).
Let me know if I can provide anything else to help!