Ensure default permissions not dropped on data wipe

bug:21954760

Change-Id: I15de766012e66e171d2089af574687ad513a5d57
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index dc38e54..95cb11d 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -12726,6 +12726,9 @@
             }
         }
 
+        // Ensure default permissions are never cleared.
+        mDefaultPermissionPolicy.grantDefaultPermissions(userId);
+
         if (needsWrite) {
             mSettings.writeRuntimePermissionsForUserLPr(userId, true);
         }