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

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

Change-Id: I0ae63fdb17b0d0c750253df6bac793e2ae06ca90
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>