Fix unit tests

lib/android/app/src/main/java/com/reactnativenavigation/presentation/OptionsPresenter.java

 public class OptionsPresenter {
     private static final int DEFAULT_TITLE_COLOR = Color.BLACK;
     private static final int DEFAULT_SUBTITLE_COLOR = Color.GRAY;
-    private static final float DEFAULT_TITLE_FONT_SIZE = UiUtils.dpToSp(18);
-    private static final float DEFAULT_SUBTITLE_FONT_SIZE = UiUtils.dpToSp(14);
+    private final float defaultTitleFontSize;
+    private final float defaultSubtitleFontSize;
 
     private TopBar topBar;
 
     public OptionsPresenter(TopBar topBar) {
         this.topBar = topBar;
+        defaultTitleFontSize = UiUtils.dpToSp(topBar.getContext(), 18);
+        defaultSubtitleFontSize = UiUtils.dpToSp(topBar.getContext(), 14);
     }
 
     public void applyChildOptions(Options options, Component child) {
     private void applyTopBarOptions(TopBarOptions options, AnimationsOptions animationOptions, Component component) {
         topBar.setTitle(options.title.text.get(""));
         if (options.title.component.hasValue()) topBar.setTitleComponent(options.title.component.get(), options.title.alignment);
-        topBar.setTitleFontSize(options.title.fontSize.get(DEFAULT_TITLE_FONT_SIZE));
+        topBar.setTitleFontSize(options.title.fontSize.get(defaultTitleFontSize));
         topBar.setTitleTextColor(options.title.color.get(DEFAULT_TITLE_COLOR));
         topBar.setTitleTypeface(options.title.fontFamily);
 
         topBar.setSubtitle(options.subtitle.text.get(""));
-        topBar.setSubtitleFontSize(options.subtitle.fontSize.get(DEFAULT_SUBTITLE_FONT_SIZE));
+        topBar.setSubtitleFontSize(options.subtitle.fontSize.get(defaultSubtitleFontSize));
         topBar.setSubtitleColor(options.subtitle.color.get(DEFAULT_SUBTITLE_COLOR));
         topBar.setSubtitleFontFamily(options.subtitle.fontFamily);
 

lib/android/app/src/main/java/com/reactnativenavigation/utils/UiUtils.java

 import android.view.ViewTreeObserver;
 import android.view.WindowManager;
 
-import com.reactnativenavigation.NavigationApplication;
-
 public class UiUtils {
     public static final int STATUS_BAR_HEIGHT_M = 24;
     public static final int STATUS_BAR_HEIGHT_L = 25;
         final int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
         statusBarHeight = resourceId > 0 ?
                 resources.getDimensionPixelSize(resourceId) :
-                (int) dpToPx(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ? STATUS_BAR_HEIGHT_M : STATUS_BAR_HEIGHT_L);
+                (int) dpToPx(context, Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ? STATUS_BAR_HEIGHT_M : STATUS_BAR_HEIGHT_L);
         return statusBarHeight;
     }
 
-    public static float dpToPx(float dp) {
-        float scale = NavigationApplication.instance.getResources().getDisplayMetrics().density;
+    public static float dpToPx(Context context, float dp) {
+        float scale = context.getResources().getDisplayMetrics().density;
         return dp * scale + 0.5f;
     }
 
-    public static float dpToSp(float dp) {
-        return dpToPx(dp) / NavigationApplication.instance.getResources().getDisplayMetrics().density;
+    public static float dpToSp(Context context, float dp) {
+        return dpToPx(context, dp) / context.getResources().getDisplayMetrics().density;
     }
 }