Show error icon on "Optimize View" handle menu

The new restart handle menu requires an error icon [1] to get
attention from the user.

This change wraps the restart handle menu with LinearLayout so
we can add the error icon on the right of the pill.

[1] go/handle-menu-error-icon-mock

Flag: com.android.window.flags.enable_restart_menu_for_connected_displays
Bug: 406073194
Test: manual
Change-Id: I9fe3eb1c5d8468cae7afb6458e39d42bf4c9e9ce