For #9516 - Adds selectable background to dialog and snackbar buttons

app/src/main/res/layout/fenix_snackbar.xml

@@ -41,6 +41,7 @@
             tools:text="This is a custom Snackbar text" />
 
         <Button
+            android:background="?android:attr/selectableItemBackgroundBorderless"
             android:id="@+id/snackbar_btn"
             style="@style/Widget.AppCompat.Button.Borderless"
             android:layout_width="wrap_content"

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

@@ -91,11 +91,13 @@
     </style>
 
     <style name="DialogButtonStyleLight" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
+        <item name="android:background">?android:attr/selectableItemBackgroundBorderless</item>
         <item name="android:textColor">?accentBright</item>
         <item name="fontFamily">@font/metropolis_semibold</item>
     </style>
 
     <style name="DialogButtonStyleDark" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
+        <item name="android:background">?android:attr/selectableItemBackgroundBorderless</item>
         <item name="android:textColor">?accentHighContrast</item>
         <item name="fontFamily">@font/metropolis_semibold</item>
     </style>