Merge "Add kcmdlinectrl for setting the kcmdline bootloader message" into main am: d318ab3e1f

Original change: https://android-review.googlesource.com/c/platform/system/extras/+/2908345

Change-Id: Iae9dfda53bb5e7ff6c7cbb07e3f53b99cd4fb0c6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>