The ornamental design for a restroomcaddy, as shown and described.
FIG. 1 is a top perspective view of a restroom caddy;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is a side view thereof
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The broken line showing in the figures is included for the purpose of illustrating portions of the restroom caddy and form no part of the claimed design.