Prevent monkey from changing usb settings

- Prevent monkey from revoking usb debugging authorizations
 - Prevent monkey from changing usb configurations

Bug: 68707778
Test: make RunSettingsRoboTests -j40
Change-Id: Idce99d60f0fbce5a9d93aceb0c2a07d27482de10

src/com/android/settings/development/SelectUsbConfigPreferenceController.java

@@ -29,6 +29,7 @@ import android.support.v7.preference.PreferenceScreen;
 import android.text.TextUtils;
 
 import com.android.settings.R;
+import com.android.settings.Utils;
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settingslib.core.lifecycle.Lifecycle;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
@@ -89,6 +90,10 @@ public class SelectUsbConfigPreferenceController extends
 
     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (Utils.isMonkeyRunning()) {
+            return false;
+        }
+
         writeUsbConfigurationOption(newValue.toString());
         updateUsbConfigurationValues();
         return true;
@@ -138,5 +143,4 @@ public class SelectUsbConfigPreferenceController extends
             setCurrentFunction(newValue, true);
         }
     }
-
 }