[automerger skipped] Update Security String to 2020-12-01 am: bfe242de am:...

[automerger skipped] Update Security String to 2020-12-01 am: bfe242de am: 72b39fb8 am: c4c139cf am: f96ad85d am: 9d2b3fa3 am: edefa3ea -s ours am: 3aa4b89b am: c4926776

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/+/12804958

Change-Id: Ia6158736a89edbf34a5523c96934c0ad71a71f43