DeviceNamePreferenceControllerTest converted to JUnit

Rather than mocking the PreferenceScreen's getPreference function,
a PreferenceManager has been created, which instantiates the Screen.
The desired Preference is added to the Screen with the testing key.
Rather than using a shadow XML, contexts' resources are mocked.
A mock WifiManager is used instead of a shadow
Duplicate test case removed, and test which succeeds locally but
not on cuttlefish marked as ignored for now.


Bug: 175389659
Test: atest -c DeviceNamePreferenceControllerTest
Change-Id: I643b22993a1d102614fed1883af7f4925947be20

src/com/android/settings/deviceinfo/DeviceNamePreferenceController.java

@@ -25,6 +25,7 @@ import android.os.Bundle;
 import android.provider.Settings;
 import android.text.SpannedString;
 
+import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;
 
@@ -44,6 +45,8 @@ public class DeviceNamePreferenceController extends BasePreferenceController
         OnSaveInstanceState,
         OnCreate {
     private static final String KEY_PENDING_DEVICE_NAME = "key_pending_device_name";
+    @VisibleForTesting
+    static final int RES_SHOW_DEVICE_NAME_BOOL = R.bool.config_show_device_name;
     private String mDeviceName;
     protected WifiManager mWifiManager;
     private final BluetoothAdapter mBluetoothAdapter;