Add system property config.disable_networktime to configure NetworkTimeUpdateService

Bug: 17934875
Change-Id: Ie5acf7266a5766f407db8f23d2c3d26920fa4020
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 92ad1ad..6009ffd 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -416,6 +416,7 @@
         boolean disableSystemUI = SystemProperties.getBoolean("config.disable_systemui", false);
         boolean disableNonCoreServices = SystemProperties.getBoolean("config.disable_noncore", false);
         boolean disableNetwork = SystemProperties.getBoolean("config.disable_network", false);
+        boolean disableNetworkTime = SystemProperties.getBoolean("config.disable_networktime", false);
         boolean isEmulator = SystemProperties.get("ro.kernel.qemu").equals("1");
 
         try {
@@ -863,7 +864,7 @@
                 reportWtf("starting SamplingProfiler Service", e);
             }
 
-            if (!disableNetwork) {
+            if (!disableNetwork && !disableNetworkTime) {
                 try {
                     Slog.i(TAG, "NetworkTimeUpdateService");
                     networkTimeUpdater = new NetworkTimeUpdateService(context);