Added SystemServiceRegistry to preloaded-classes

SystemServiceRegistry class should be preloaded in the zygote.

Bug: 20559324
Change-Id: I3120c7e42b50c54213513a04d7135d745c8abd7c
diff --git a/preloaded-classes b/preloaded-classes
index 95d0b42..c94623a 100644
--- a/preloaded-classes
+++ b/preloaded-classes
@@ -402,6 +402,7 @@
 android.app.SharedPreferencesImpl$EditorImpl$1
 android.app.SharedPreferencesImpl$EditorImpl$2
 android.app.SharedPreferencesImpl$MemoryCommitResult
+android.app.SystemServiceRegistry
 android.app.admin.DevicePolicyManager
 android.app.admin.IDevicePolicyManager$Stub
 android.app.admin.IDevicePolicyManager$Stub$Proxy