Add (AM)OLED filter

[LuccoJ]

The information on whether the screen is AMOLED or LCD seems to be usually present on the LineageOS wiki, and so it would be nice if only devices with one type of screen could be searched for. Personally, I'm accustomed to AMOLED devices and have found LCD not so impressive, so I would weed out a lot of phones I wouldn't want by having such a filter.