Merge "Revert "Define a tool and a static rule to calculate the hash of a...

Merge "Revert "Define a tool and a static rule to calculate the hash of a directory"" into main am: 7e047248

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3428222



Change-Id: Ia99099defea35df4fa6ecaa64fb903f84fa8a9b7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>