Merge "orchestrator: inner-tree path can be a list." am: ef1d2f06c6 am: d2655af162 am: 5e365c170e

Original change: https://android-review.googlesource.com/c/platform/build/+/2138856

Change-Id: I2cba82e9551d0bb2416576ed5617f11bc82ea0bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>