Update kernel to builds 6764805 am: 506f698ba7

Original change: https://android-review.googlesource.com/c/device/google/cuttlefish_kernel/+/1401707

Change-Id: Ifc4506e42578363480ed20ff594f7906d27f7022
tree: a6e63a49ca45ee7e88e4aa02a39a30112fa63d85
  1. 5.4-arm64/
  2. 5.4-x86_64/
  3. scripts/
  4. Android.bp
  5. METADATA
  6. OWNERS
  7. TEST_MAPPING