Clean up sysprop_test TEST_MAPPING am: 17874a69ee am: d1efe7b903

Original change: https://android-review.googlesource.com/c/platform/system/tools/sysprop/+/1564362

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I7ef365c3af79e4a3beaa75b31a7c8e27f007569e