Add the system property threadnetwork.country_code am: 9ed86ce2ac

Original change: https://android-review.googlesource.com/c/platform/system/libsysprop/+/2923770

Change-Id: Ib77acc54e728db87a1969f9971fb8e65eeaa672b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
tree: bf88fba09d6f0385b840a1bc208a0ba6553c5cfa
  1. srcs/
  2. CAR_OWNERS
  3. OWNERS