Don't load config on the initializing thread

Bug: 73350582
Test: boot
Test: atest CtsSyncManagerTest
Change-Id: I78978651693147d1647b3d3817a1f16dbf747580
diff --git a/services/core/java/com/android/server/content/SyncManagerConstants.java b/services/core/java/com/android/server/content/SyncManagerConstants.java
index 3139d54..061e4ca 100644
--- a/services/core/java/com/android/server/content/SyncManagerConstants.java
+++ b/services/core/java/com/android/server/content/SyncManagerConstants.java
@@ -55,7 +55,6 @@
     protected SyncManagerConstants(Context context) {
         super(null);
         mContext = context;
-        refresh();
     }
 
     public void start() {