Update to ChromeOS 15047.0.0

Merge commit '2bb5b38e85c3dfd3d3d4c97d0e6ccf38906b9074' into sdk-update-pre

BUG=b/257271340
TEST=presubmit
RELEASE_NOTE=None

Change-Id: Id87e1dff67a95027495685ffc9e5489d5fa43621