Move the try_start dump property to 'flags' am: 1dd292be0d am: e8bfc700b7

Original change: https://android-review.googlesource.com/c/platform/art/+/2320053

Change-Id: I127cbe23e774060aa4431f42aa30a54f59d11964
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>