Don't preinflate all apps for taskbar in AllAppsStore#setApps

Triggering all apps pre-infation at AllAppsStore#setApps is too late for taskbar, because it is in same frame when user opens all apps from taskbar. We should find an earlier entry point to pre-inflate all apps for taskbar.

Test: Verify taskbar is rendered correctly. Also verify we no longer pre-inflate all apps for taskbar in perfetto trace
Change-Id: If1f8c616b6be7f64ea16807f4b7a8b75da55d038