Update kernel to builds 7681694 am: c1b0efb97c am: 7769420721 am: 37766c0102 am: 43c57fb32e

Original change: https://android-review.googlesource.com/c/kernel/prebuilts/4.19/arm64/+/1814637

Change-Id: I45f37bc8267668153d98f5443fa1523e22a75510