Extend paths command to take input source files. am: 842527aad0 am: 823520c847

Original change: https://android-review.googlesource.com/c/platform/tools/treble/+/2239058

Change-Id: If18d0d14efd9540b044fe38b210f59ac35ff669d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>