[automerger skipped] Update Security String to 2021-10-01 am: f54f3e81 am:...

[automerger skipped] Update Security String to 2021-10-01 am: f54f3e81 am: 102502b0 am: 5d40b4be am: 12af7082 -s ours am: 651c7b83 -s ours am: 933cc26b -s ours am: cdd8ee8d -s ours

am skip reason: Merged-In I36d8511d8ab1556af5c278c8d65d7c3ee6f1878d with SHA-1 6ccb50dd is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/15546870

Change-Id: Ibd0349204e9744e38bf1a2f12639b02906c1e86f