Update kernel prebuilts: am: 9a4b8e7389 am: 2d22b6ef85 am: 3e716b1732

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/qemu-kernel/+/10474414

Change-Id: Id5a676f8ef75efabc596fb412f9c12517546e32e