Draw focus outline in search app result

Before:
https://screenshot.googleplex.com/9qoPoBNZkDY94gy
https://screenshot.googleplex.com/7XVFxwj8d6UqLUs
https://screenshot.googleplex.com/4KtQcma26eSdBnb

After:
https://screenshot.googleplex.com/BxfNAJGqXhyGBbJ
https://screenshot.googleplex.com/8EMKUQW4ubXHdDd
https://screenshot.googleplex.com/32KBfdj4preL8H6

Bug: 319454774
Test: Manual, open all apps, type some word and press enter to search. Navigate to the search result below and outline should appear
Test: will add screenshot test in b/318360469
Flag: ACONFIG com.android.launcher3.enable_focus_outline Development
Change-Id: I8caef8dd9e590d43e05baa78cebee73d21b84acf