Merge "Add hidl_test to TEST_MAPPING" into main am: 225d46b066

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2904939

Change-Id: Iba1764256fd52af78dfd89712d5106551a83b746
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>