Merge "inner_build: add --multitree-build to soong invocations" am: e0d05833b9 am: 4914d5f716 am: c88d7a6339

Original change: https://android-review.googlesource.com/c/platform/build/orchestrator/+/2488756

Change-Id: I57c09c3d4893641ee2f0c1405ef43fe49e836077
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>