Update kernel to builds 7518296 am: 1baf62ab03 am: 116a32ce84 am: 7d46db2155 am: 7a571e8bcc

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.4/x86-64/+/15220030

Change-Id: I4b34b241a4ac1762ca2410898db40edffd581cd4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>