[automerger skipped] Update Security String to 2021-07-01 am: 5edc0cec am:...

[automerger skipped] Update Security String to 2021-07-01 am: 5edc0cec am: d8033580 am: da500450 am: 81fc2eda -s ours am: 69723602 -s ours

am skip reason: Merged-In Icdc728241b1bfe2428d1e6536a1a3b51f7a4a708 with SHA-1 64b00db8 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/14694771

Change-Id: Id10a547beac8f5617aedb7e49940dbd02326bb6a