camera: Bring back ignorePreferredPreviewSizeForVideo

 * Still needed on some old but capable devices that report
   a tiny preferred preview size

Change-Id: Ib78e0683cbf29644fc6f21200b55ee2efa90bbae
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Camera2 into cd-4.4-legacy