Android Build Crashes on Start: Didn't find class "com.facebook.FacebookContentProvider"

Using Unity 2017.1.2f1, I built my app for Android. Build completed successfully. I used "Build & Run", which loaded it onto the Android device I have attached to my PC via USB.

When the app starts on my Android device, it says, "Unfortunately, Bingo has stopped."

Looking at the logcat, I see this:

 E/AndroidRuntime(24085): FATAL EXCEPTION: main
 E/AndroidRuntime(24085): Process: com.darrensmith.net.bingo, PID: 24085
 E/AndroidRuntime(24085): java.lang.RuntimeException: Unable to get provider com.facebook.FacebookContentProvider: java.lang.ClassNotFoundException: Didn't find class "com.facebook.FacebookContentProvider" on path: DexPathList[[zip file "/data/app/com.darrensmith.net.bingo-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.darrensmith.net.bingo-2, /vendor/lib, /system/lib]]
 E/AndroidRuntime(24085):        at android.app.ActivityThread.installProvider(ActivityThread.java:5121)
 E/AndroidRuntime(24085):        at android.app.ActivityThread.installContentProviders(ActivityThread.java:4713)
 E/AndroidRuntime(24085):        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4596)
 E/AndroidRuntime(24085):        at android.app.ActivityThread.access$1600(ActivityThread.java:169)
 E/AndroidRuntime(24085):        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1340)
 E/AndroidRuntime(24085):        at android.os.Handler.dispatchMessage(Handler.java:102)
 E/AndroidRuntime(24085):        at android.os.Looper.loop(Looper.java:146)
 E/AndroidRuntime(24085):        at android.app.ActivityThread.main(ActivityThread.java:5487)
 E/AndroidRuntime(24085):        at java.lang.reflect.Method.invokeNative(Native Method)
 E/AndroidRuntime(24085):        at java.lang.reflect.Method.invoke(Method.java:515)
 E/AndroidRuntime(24085):        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
 E/AndroidRuntime(24085):        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
 E/AndroidRuntime(24085):        at dalvik.system.NativeStart.main(Native Method)
 E/AndroidRuntime(24085): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.facebook.FacebookContentProvider" on path: DexPathList[[zip file "/data/app/com.darrensmith.net.bingo-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.darrensmith.net.bingo-2, /vendor/lib, /system/lib]]
 E/AndroidRuntime(24085):        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67)
 E/AndroidRuntime(24085):        at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
 E/AndroidRuntime(24085):        at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
 E/AndroidRuntime(24085):        at android.app.ActivityThread.installProvider(ActivityThread.java:5106)
 E/AndroidRuntime(24085):        ... 12 more

What could case the class com.facebook.FacebookContentProvider to not be found?

This app builds & runs successfully in iOS and Windows.