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: I8136c18f85e59d42171b5c05984f28f5999bd6b6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>