Merge "binder: Add an API to check if the threadpool has been started" am: 13ba533558

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2334882

Change-Id: I87e5ccf342860456bafc366d9412c9881a2f1fe2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>