Build vendor_boot-chd_debug.img to add CHD debug ramdisk am: 12bb05a136 am: 4348857df0

Original change: https://android-review.googlesource.com/c/platform/tools/treble/+/2908078

Change-Id: Ic136e5d896fac1b975f3ba6769ee92435d52ac98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>