[BugFix] Fix the media reco expanded layout when there is less than 6 items.

Screenshots:
- Before fix: http://screen/8PQhpUbKU88shZD
- After fix: http://screen/634Fw3ik5TKzrJ6; http://screen/67qumVeRFmEVThH

Bug: 186989643
Test: Studio builds
Change-Id: I7d7eacbfad1568c53f21060bc342c720c002b03d