Make cells 'flavorid' for resizes

Cells should use 'flavorid' (not 'id') for resizes.

bug 1241222

Change-Id: I57b997425f183f25d3ca032c7d8c35c1f49e3afc
(cherry picked from commit 034df6e875d6c0b590f3cfb802574c2f982fd534)
Merge "Make cells 'flavorid' for resizes" into stable/havana