Print used adb version am: 7a2ce22cd5

Original change: https://android-review.googlesource.com/c/platform/art/+/2335565

Change-Id: I3e843656bb58bb82c4486aff6b83631cd5aa360e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>