Merge "libbinder: LazyServiceRegistrar documentation" am: 02d7e69f93 am: 7baa467475 am: 5dfc123171 am: cbaca0bc20

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1391126

Change-Id: I36d427d861cb95ac77f947d94050805a85053417