For #25994: Make installToHomescreen item a collapsing menu limit.

The item is visible instead of addToHomeScreenItem when
current session can be installed as a PWA.

app/src/main/java/org/mozilla/fenix/components/toolbar/DefaultToolbarMenu.kt

@@ -184,6 +184,7 @@ open class DefaultToolbarMenu(
             label = context.getString(R.string.browser_menu_install_on_homescreen),
             notificationTint = getColor(context, R.color.fx_mobile_icon_color_information)
         ),
+        isCollapsingMenuLimit = true,
         isHighlighted = {
             !context.settings().installPwaOpened
         }