Revert "ITS: remove preview testing of low resolution formats"

This reverts commit 32c6235d0bc3659d0b84ace3cc81aa45158a9ddf.

Reason for revert: Discussion in Framework team on better filtering of minimum size, and QVGA (320x240) is still a size open for debate.

Change-Id: I4016349b180dd0af5d8bc4fd077a1eedc03e0354