Update Test924 to filter for messages related to test thread am: df4219a87b am: 4f31300fd6

Original change: https://android-review.googlesource.com/c/platform/art/+/2223919

Change-Id: I1088490e88cb55ab5d1ae059767fb478abca2d9a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>