Fix test target name in TEST_MAPPING file am: 9eb275ef74

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libpalmrejection/+/18604552

Change-Id: I4845237408d6590786b8084fbe39c9b2682a2404
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>