Fix LegacyProviderMigrationTest

Added 5s sleep after killing the MediaProvider (from clearing
data).

With FUSE, killing the MediaProvider causes a vold reset, and
unmounts all volumes. This means that even if the MediaProvider is
back up, the volumes may not be ready until a short while
after. Hence, any ContentResolver requests will fail until the volumes
are mounted.

Test: atest LegacyProviderMigrationTest
Bug: 148955744
Change-Id: Idb8cd9e16c9c92b3eaef36fc3934c6271b57bf0b
1 file changed