Update kernel to builds 6598026 am: 5f66ee79ce am: 7418a5ec3c

Original change: https://googleplex-android-review.googlesource.com/c/device/google/cuttlefish_kernel/+/11897680

Change-Id: I44dc57e080fbb6892c9b0f598272cf56a78bb65b
tree: f355230a9472d8c5a2793a3a217f03299b86eb41
  1. 5.4-arm64/
  2. 5.4-x86_64/
  3. scripts/
  4. Android.bp
  5. OWNERS
  6. TEST_MAPPING