Merge "[Thread] add Android.bp for Thread flags" into main am: e19a753182 am: e5547186f5

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2900567

Change-Id: I01d4affaba1c3859b802a79d33b3d56de860e8cc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>