Update UI: clean up theme

V2rayNG/app/src/main/res/values/styles.xml

@@ -1,6 +1,6 @@
 <resources>
 
-    <style name="AppThemeDayNight" parent="Theme.AppCompat.DayNight.DarkActionBar">
+    <style name="AppThemeDayNight" parent="Theme.AppCompat.DayNight">
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>
@@ -34,9 +34,4 @@
         <item name="android:colorBackgroundCacheHint">@null</item>
         <item name="android:windowIsTranslucent">true</item>
     </style>
-
-    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
-
-    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
-
 </resources>