Use app resources in theme setting test

Author: MihaiCristianCondrea

app/src/test/java/com/d4rk/androidtutorials/java/data/repository/DefaultMainRepositoryApplyThemeSettingsTest.java

@@ -17,7 +17,7 @@
 import static org.junit.Assert.*;
 
 @RunWith(RobolectricTestRunner.class)
-@Config(manifest = Config.NONE, sdk = 33)
+@Config(sdk = 33)
 public class DefaultMainRepositoryApplyThemeSettingsTest {
 
     private static final String[] DARK_MODE_VALUES = {