Rename ro.monkey to monkey.running

So that Monkey can set ro.mokey before running and reset it after running.

core/java/android/accounts/AccountManagerService.java

@@ -152,7 +152,7 @@ public class AccountManagerService
             new AtomicReference<AccountManagerService>();
 
     private static final boolean isDebuggableMonkeyBuild =
-            SystemProperties.getBoolean("ro.monkey", false)
+            SystemProperties.getBoolean("monkey.running", false)
                     && SystemProperties.getBoolean("ro.debuggable", false);
     private static final Account[] EMPTY_ACCOUNT_ARRAY = new Account[]{};