Merge "Remove cutils threads.h header completely." into main am: 4ed0e12d am: b1f6f92d

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2702415



Change-Id: I43e0e1077db9b74632bf1d626829054c6db679bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>