title: Crash when attempting to show an audience network rewarded video
body: <p>In our game we are using the Facebook SDK for Unity (v7.5.0), together with rewarded video mediation from IronSource.</p>
  
  <p>The underlying Facebook SDK for Android is v4.11.0.</p>
  
  <p>When attempting to show a rewarded video, our game crashes with this exception:</p>
  
  <pre><code>E/JavaBinder( 1172): !!! FAILED BINDER TRANSACTION !!!  (parcel size = 521496)
  W/ActivityManager( 1172): Exception when starting activity com.moonactive.coinmaster/com.facebook.ads.AudienceNetworkActivity
  W/ActivityManager( 1172): android.os.TransactionTooLargeException: data parcel size 521496 bytes
  W/ActivityManager( 1172):   at android.os.BinderProxy.transactNative(Native Method)
  W/ActivityManager( 1172):   at android.os.BinderProxy.transact(Binder.java:503)
  W/ActivityManager( 1172):   at android.app.ApplicationThreadProxy.scheduleLaunchActivity(ApplicationThreadNative.java:1088)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStackSupervisor.realStartActivityLocked(ActivityStackSupervisor.java:2540)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStackSupervisor.startSpecificActivityLocked(ActivityStackSupervisor.java:2661)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStack.resumeTopActivityInnerLocked(ActivityStack.java:3493)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStack.resumeTopActivityLocked(ActivityStack.java:2613)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStackSupervisor.resumeTopActivitiesLocked(ActivityStackSupervisor.java:5060)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStack.completePauseLocked(ActivityStack.java:1687)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStack.completePauseLocked(ActivityStack.java:1552)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityStack.activityPausedLocked(ActivityStack.java:1474)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityManagerService.activityPaused(ActivityManagerService.java:10204)
  W/ActivityManager( 1172):   at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:547)
  W/ActivityManager( 1172):   at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:4014)
  W/ActivityManager( 1172):   at android.os.Binder.execTransact(Binder.java:453)
  D/ActivityManager( 1172): isAutoRunBlockedApp:: com.moonactive.coinmaster, Auto Run ON
  W/ActivityManager( 1172): Force removing ActivityRecord{6a0b73e u0 com.moonactive.coinmaster/com.moon.coinmaster.android.GameActivity t756}: app died, no saved state
  </code></pre>
  
  <p>Is this a known bug that has been resolved? I could not find any bugs similar to this.</p>