Update Test924 to filter for messages related to test thread am: df4219a87b am: 4f31300fd6 am: 4d44ed036b

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

Change-Id: I6cffcac4e7ab62633ef415f836bdd978c04aeba1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>