Upgrade getrandom to 0.2.12 am: 1872b3e122

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/getrandom/+/2944786

Change-Id: I315dfe2e9f343a483e0a525f8f29e2a53fc9e8f7
Signed-off-by: Automerger Merge Worker <[email protected]>