The ornamental design for a privacycover for a device, as shown and described.
FIG. 1 is a top, front, right-side perspective view of a privacy cover for a device;
FIG. 2 is a top, back, left-side perspective view thereof;
FIG. 3 is a bottom, back, right-side perspective view thereof;
FIG. 4 is a bottom, back, left-side perspective view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a back view thereof;
FIG. 7 is a left-side view thereof;
FIG. 8 is a right-side view thereof;
FIG. 9 is a top view thereof;
FIG. 10 is a bottom view thereof; and,
FIG. 11 is a top, front, right-side perspective view thereof including a disclaimed device (e.g., camera) for environmental context.
The dashed broken lines depict portions of the privacy cover for a device and/or environment of the privacy cover for a device that form no part of the claimed design.