rdroidtest: add attribute proc macro am: 4e93ffd4e2

Original change: https://android-review.googlesource.com/c/platform/platform_testing/+/2890086

Change-Id: Ida7f2486cf986d3d44cac1531c72f0389c14c1f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>