Add alternate optional key maps for Photon Q keyboard

- moved to separate package from the now obsolete device parts package

Change-Id: Ic180116242543cb0f535341faae665651d411f86
overlay: Indicate single stage camera key

Change-Id: Iac9cf3303e7ed5759afb766d7cf5d62589dd1677
Merge "Add alternate optional key maps for Photon Q keyboard" into kk
Merge "overlay: Indicate single stage camera key" into kk