Update kernel to builds 7518296 am: b8a97f1e6b am: 74878bdcff am: 41d7726cdc am: af1974371e am: f15a1c0610 am: e16d96b8a6 am: f7dcb94b50

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/common-modules/virtual-device/5.4/x86-64/+/15218136

Change-Id: I5c39fd14aac061380a1ed305cf4abb619f664475
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>