[fenix] For https://github.com/mozilla-mobile/fenix/issues/1072: Adds onAttachedToWindow

app/src/main/java/org/mozilla/fenix/browser/BrowserFragment.kt

@@ -210,7 +210,7 @@ class BrowserFragment : Fragment(), BackHandler {
         )
 
         val actionSheet = view.findViewById<QuickActionSheet>(R.id.quick_action_sheet)
-        actionSheet.afterInflate()
+        //actionSheet.afterInflate()
 
         val actionEmitter = ActionBusFactory.get(this).getManagedEmitter(SearchAction::class.java)
         sessionId?.let { id ->

app/src/main/java/org/mozilla/fenix/quickactionsheet/QuickActionSheet.kt

@@ -31,7 +31,8 @@ class QuickActionSheet @JvmOverloads constructor(
         inflate(getContext(), R.layout.layout_quick_action_sheet, this)
     }
 
-    fun afterInflate() {
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
         setupHandle()
     }