LTS Refresh: Merge release-R121-cos-6.6 up to dd345ab82841

BUG=b/529917915
TEST=presubmit
RELEASE_NOTE=LTS Refresh from main-R121-cos-6.6 to release-R121-cos-6.6

cos-patch: lts-refresh
Change-Id: I0488a3493bfdd83ec6404a3079047629d26bdcc3
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/166267
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>