An ornamentaldesign for a shower valve trim package, as shown and described.
FIG. 1 is a front view of a shower valve trim package
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof.
FIG. 4 is a left side view thereof; and,
FIG. 5 is a perspective view thereof.
The broken line showing rear valve housing is included for the purpose of illustrating a portion of the shower valve that forms no part of the claimed design.