We claim the ornamental design for an aircraft lavatory cabinet, as shown and described.
FIG. 1 is a perspective view of an aircraft lavatory cabinet showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof; and,
FIG. 4 is a top view thereof.
The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.