Move accessibility manager service to own package.

Change-Id: I0d73737a21615f0ff0abc80b757fb8c9bcb50be5
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 4e1bbac..cd8915d 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -16,6 +16,7 @@
 
 package com.android.server;
 
+import com.android.server.accessibility.AccessibilityManagerService;
 import com.android.server.am.ActivityManagerService;
 import com.android.server.pm.PackageManagerService;
 import com.android.server.usb.UsbService;