title: Class not found when unmarshalling when installing an app via Fabric Beta
body: <p>I'm having this strange error when users are installing my app via Fabric's Beta causing the install to fail. This seems to only affect Samsung devices.</p>
  
  <pre><code>Class not found when unmarshalling: com.android.packageinstaller.InstallFlowAnalytics
                                       java.lang.ClassNotFoundException: com.android.packageinstaller.InstallFlowAnalytics
                                           at java.lang.Class.classForName(Native Method)
                                           at java.lang.Class.forName(Class.java:324)
                                           at android.os.Parcel.readParcelableCreator(Parcel.java:2404)
                                           at android.os.Parcel.readParcelable(Parcel.java:2358)
                                           at android.os.Parcel.readValue(Parcel.java:2264)
                                           at android.os.Parcel.readArrayMapInternal(Parcel.java:2614)
                                           at android.os.BaseBundle.unparcel(BaseBundle.java:221)
                                           at android.os.BaseBundle.getString(BaseBundle.java:920)
                                           at android.content.Intent.getStringExtra(Intent.java:6183)
                                           at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2695)
                                           at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2157)
                                           at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:6337)
                                           at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:6115)
                                           at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:170)
                                           at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3985)
                                           at android.os.Binder.execTransact(Binder.java:453)
                                        Caused by: java.lang.ClassNotFoundException: com.android.packageinstaller.InstallFlowAnalytics
                                           at java.lang.Class.classForName(Native Method)
                                           at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
                                           at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
                                           at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
                                           at java.lang.Class.classForName(Native Method) 
                                           at java.lang.Class.forName(Class.java:324) 
                                           at android.os.Parcel.readParcelableCreator(Parcel.java:2404) 
                                           at android.os.Parcel.readParcelable(Parcel.java:2358) 
                                           at android.os.Parcel.readValue(Parcel.java:2264) 
                                           at android.os.Parcel.readArrayMapInternal(Parcel.java:2614) 
                                           at android.os.BaseBundle.unparcel(BaseBundle.java:221) 
                                           at android.os.BaseBundle.getString(BaseBundle.java:920) 
                                           at android.content.Intent.getStringExtra(Intent.java:6183) 
                                           at com.android.server.am.ActivityStackSupervisor.startActivityLocked(ActivityStackSupervisor.java:2695) 
                                           at com.android.server.am.ActivityStackSupervisor.startActivityMayWait(ActivityStackSupervisor.java:2157) 
                                           at com.android.server.am.ActivityManagerService.startActivityAsUser(ActivityManagerService.java:6337) 
                                           at com.android.server.am.ActivityManagerService.startActivity(ActivityManagerService.java:6115) 
                                           at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:170) 
                                           at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:3985) 
                                           at android.os.Binder.execTransact(Binder.java:453) 
                                        Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
  </code></pre>
  
  <p>Has anyone else seen this or know what might be causing it? Thanks</p>