Change internal style filesystem to an internal registry and introduce style options concept

app/src/main/res/drawable/ic_dropdown.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="960" android:viewportWidth="960" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M480,600L280,400L680,400L480,600Z"/>
+    
+</vector>