Merge "Improve Rust documentation of Binder thread pool." am: 7ed4fc1d39 am: b09fd75200 am: ced50cdfed am: b66a46e80d

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2636289

Change-Id: I3206fc0e212d12a38fba374266991ce364390f1d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>