Add Sibon wallpapers

Default wallpaper is set to a7_bw.

Issue: FP2N-196
Change-Id: I52983e696cc246ccd7d0ae361d6f7b69835d471d
Depends-On: I4f3856bdc3d9545bf0f0883e8479548ea7650d6a
3 files changed
tree: 10bae6ca34c02b601bcec9089b3a9af032894191
  1. overlay/
  2. device-vendor.mk