Merge "Remove obsolete multitree directory" into main am: 63ce25b55e

Original change: https://android-review.googlesource.com/c/platform/development/+/2836195

Change-Id: I073250eb1a524c1a7187609e3b18fdf76849d8bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>