zero: Snap: add overlays to force preview size
zero: Snap: add overlays to force preview size

* Also disable open_legacy() usage

Change-Id: I040a63e5a1b9d146b7465383e16b1be445ed03fd
Signed-off-by: Brandon McAnsh <b221b0128acc8543b2071d143ea6dbc7b1554a73@gmail.com>
(cherry picked from commit 2a8847f4b76bdeec18ae93092366cd8e77b76d34)

TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common,TeamNexus/android_device_samsung_zero-common