Update kernel to builds 8840540 am: 6d340babb8 am: 2cd8f70372 am: 48df4c8277

Original change: https://googleplex-android-review.googlesource.com/c/device/google/cuttlefish_prebuilts/+/19320908

Change-Id: I27bac7dd020805410d4334caf22af3941c196fa0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>