Update kernel to builds 7618735 am: ba4c2c0e14 am: df53726c48 am: e14321c5ec

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.10/arm64/+/15494431

Change-Id: I4d44d1b7501317c245537dd3580efa02f9e0d516