Merge "libbinder: update getCallingPid docs" into main am: e615929b5b am: 73aa558f82

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2871198

Change-Id: I9686b7d13105027120b41144d9333c1df0dce6f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>