add prebuilts

Change-Id: I7c77a2d50ba531fbf36e29593664cb6ed39fa30d
sync build numbers for nexus products

Change-Id: I001d54c5619e46fc84157abd135f3d0e56402b6f
unify products and packages

Change-Id: I27a76264e7401b030d7a9c0d441f3f3944887bf6