Merge "[Thread] define Thread network flags for platform code" into main am: 5059e0cc

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2926431



Change-Id: Icf6b61040a7b68b6e1229d49a09dbc5f3c7172ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>