Update kernel to builds 7518296 am: 3825e2ebe0 am: f48f5b5be0 am: 566d758b3f am: da4c15f458 am: dbec5ca0dc am: a8ffe88330

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.4/arm64/+/15219033

Change-Id: I3c1c423ff44f4d0afc3f07c2da26a58cd3362a1d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>