Update kernel to builds 8949902 am: 81b370e599 am: 8395efc4c8 am: 2a21513b2f

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/common-modules/virtual-device/5.10/arm64/+/19663201

Change-Id: If98e82a788d9ad8168e53afb6638c96e661c3ad5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>