[automerger skipped] [automerge] RESTRICT AUTOMERGE Use chain start token in performOpTransaction 2p: 9d09846798 am: 7799cef625 -s ours am: e92131811d -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20521154

Change-Id: I0708da59e748b8eebe817292928fcc3b4c3a1c2c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>