We claim the ornamental design for an electronic device, as shown and described.
FIG. 1 is a front perspective view of an electronic device showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left-side view thereof;
FIG. 5 is a right-side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear perspective view thereof.
The broken lines in the figures depict environmental subject matter and form no part of the claimed design. The unshaded surfaces shown between the solid lines and the broken lines form no part of the claim.
The dot-dash broken lines in the figures represent an unclaimed boundary line and form no part of the claimed design.