Update the AppsRow to Material 3

This follows the spec. There are still some outstandings questions
(please see attached bug) mainly around the margins between items. Until
these are answered, let's land this part as it looks fine for now.

Bug: 406671405
Test: atest com.android.documentsui.AppsRowManagerTest
Flag: com.android.documentsui.flags.use_material3
Change-Id: I80c953c4ad7ae30a8d4674fad3c4c5c6048503dc