[automerger skipped] Revert "remove the Thread Network HAL from the stage folder" am: 06c521f2 -s ours

am skip reason: Merged-In I7e4bf260c03dd0500725fec068747e3b3d05820c with SHA-1 1f6989f5 is already in history. Merged-In was found from reverted change.

Reverted change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/23630005

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/23673539



Change-Id: I212762a18492c74592ac1707fbfe994d5a46285c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>