The ornamental design for a handsetcase, as shown and described.
FIG. 1 is a perspective front view of a handset case showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective front view of a handset case showing my new design in an in-use position, including the broken line environment of a handset and wrist strap.
The broken lines indicate portions of the handset case that form no part of the claimed design.