Launcher3: fix app shortcuts for suspended apps

This CL fixes app shortcuts for suspended packages.

1) When DO/PO suspends an app, its pinned shortcuts are instantly grayed
out, but this is not persisted after the launcher restarts (e.g. device
reboot). We now enforce the launcher to check the suspended state when
loading the workspace, and gray out pinned shortcut icons accordingly.

2) When DO/PO suspends an app, its app shortcut popup is still
available. We now temporarily disable the popup when the app is
suspended, and persist the state across restarts.

Bug: 32365540
Test: manual, by following the steps in the bug above
Test: manual, by restarting the launcher package
Change-Id: I983d7c17fa198beca23b66459b50bd67b447bdd2