Update kernel to builds 6841645 am: 54f0fb3d0c

Original change: https://android-review.googlesource.com/c/device/google/cuttlefish_kernel/+/1428208

Change-Id: Ie872341e099b5195e57035d0cbb821e147480ca8
tree: bf6eae1c9c9f4e4b027da39d154080331086b166
  1. 5.4-arm64/
  2. 5.4-x86_64/
  3. scripts/
  4. Android.bp
  5. METADATA
  6. OWNERS
  7. TEST_MAPPING