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

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

Change-Id: I319a96fd415a9d23cbf4f0dff4d5dc38772935ba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>