Add 12dp margin to top of stories context menu.

app/src/main/java/org/thoughtcrime/securesms/stories/dialogs/StoryContextMenu.kt

@@ -222,6 +222,7 @@ object StoryContextMenu {
       .onDismiss {
         callbacks.onDismissed()
       }
+      .offsetY(DimensionUnit.DP.toPixels(12f).toInt())
       .offsetX(DimensionUnit.DP.toPixels(16f).toInt())
       .show(actions)
   }