Don't allow secondary users to change Wi-Fi assistants.

This is not ideal but better than the current situation given that the
rest of the connectivity stack does not properly support multi-user.

Bug: 17320659
Change-Id: Ia0d4c746b4ebe6ce90df7ff39f0398ca78fd61f6

src/com/android/settings/ActiveNetworkScorerDialog.java

@@ -23,6 +23,7 @@ import android.net.NetworkScoreManager;
 import android.net.NetworkScorerAppManager;
 import android.net.NetworkScorerAppManager.NetworkScorerAppData;
 import android.os.Bundle;
+import android.os.UserHandle;
 import android.text.TextUtils;
 import android.util.Log;
 
@@ -69,6 +70,10 @@ public final class ActiveNetworkScorerDialog extends AlertActivity implements
     }
 
     private boolean buildDialog() {
+        if (UserHandle.myUserId() != UserHandle.USER_OWNER) {
+            Log.i(TAG, "Can only set scorer for owner user.");
+            return false;
+        }
         NetworkScorerAppData newScorer = NetworkScorerAppManager.getScorer(this, mNewPackageName);
         if (newScorer == null) {
             Log.e(TAG, "New package " + mNewPackageName + " is not a valid scorer.");

src/com/android/settings/wifi/AdvancedWifiSettings.java

@@ -29,6 +29,7 @@ import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.net.wifi.WpsInfo;
 import android.os.Bundle;
+import android.os.UserHandle;
 import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceClickListener;
@@ -129,9 +130,9 @@ public class AdvancedWifiSettings extends SettingsPreferenceFragment
         pref.setIntent(intent);
 
         final Context context = getActivity();
-        NetworkScorerAppData scorer = getWifiAssistantApp(context);
         SwitchPreference wifiAssistant = (SwitchPreference)findPreference(KEY_WIFI_ASSISTANT);
-        if (scorer != null) {
+        NetworkScorerAppData scorer = getWifiAssistantApp(context);
+        if (UserHandle.myUserId() == UserHandle.USER_OWNER && scorer != null) {
             final boolean checked = NetworkScorerAppManager.getActiveScorer(context) != null;
             wifiAssistant.setSummary(getResources().getString(
                     R.string.wifi_automatically_manage_summary, scorer.mScorerName));