Update kernel to builds 8949913 am: 88689b052e am: e8ea10987b

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.15/x86-64/+/19651149

Change-Id: Ia3bf2cd7e852f8284a7692a8cd87f4ccf5b1b568
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>