zcr_stylus_v2: Add pointer_stylus interface am: 022e363d0b am: 8cd348884a am: 704551387c

Original change: https://android-review.googlesource.com/c/platform/external/wayland-protocols/+/1439432

Change-Id: I831630a17710c599c8cb121c98ca4b6380df8600