Don't make isSafeMode a field on the Zygote class.

This field is written and read exclusively by the system server,
and should therefore belong to the SystemServer class.

Change-Id: I2708a9a45c0c9cd1a6f563e8cc5844bd8c424bf7

services/java/com/android/server/SystemServer.java

@@ -824,7 +824,7 @@ class ServerThread {
         if (safeMode) {
             ActivityManagerService.self().enterSafeMode();
             // Post the safe mode state in the Zygote class
-            Zygote.systemInSafeMode = true;
+            SystemServer.inSafeMode = true;
             // Disable the JIT for the system_server process
             VMRuntime.getRuntime().disableJitCompilation();
         } else {
@@ -1117,6 +1117,11 @@ public class SystemServer {
     // give any timezone code room without going into negative time.
     private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000;
 
+   /**
+    * When set, all subsequent apps will be launched in safe mode.
+    */
+    public static boolean inSafeMode;
+
     /**
      * Called to initialize native system services.
      */

services/java/com/android/server/am/ActivityManagerService.java

@@ -2768,7 +2768,7 @@ public final class ActivityManagerService extends ActivityManagerNative
             // Run the app in safe mode if its manifest requests so or the
             // system is booted in safe mode.
             if ((app.info.flags & ApplicationInfo.FLAG_VM_SAFE_MODE) != 0 ||
-                Zygote.systemInSafeMode == true) {
+                SystemServer.inSafeMode == true) {
                 debugFlags |= Zygote.DEBUG_ENABLE_SAFEMODE;
             }
             if ("1".equals(SystemProperties.get("debug.checkjni"))) {