Android: Use material dividers

Source/Android/app/src/main/res/values/styles.xml

@@ -63,4 +63,8 @@
         <item name="tickVisible">false</item>
         <item name="labelBehavior">gone</item>
     </style>
+
+    <style name="DolphinDivider" parent="Widget.Material3.MaterialDivider">
+        <item name="dividerColor">?attr/colorSurfaceVariant</item>
+    </style>
 </resources>

Source/Android/app/src/main/res/values/themes.xml

@@ -54,6 +54,7 @@
         <item name="materialAlertDialogTheme">@style/DolphinMaterialDialog</item>
         <item name="popupTheme">@style/DolphinPopup</item>
         <item name="sliderStyle">@style/DolphinSlider</item>
+        <item name="materialDividerStyle">@style/DolphinDivider</item>
     </style>
 
     <!-- Trick for API >= 27 specific changes -->