Add a module-lib API for constructing a LocalSocket from an fd. am: 8093d78d1c am: 15bf48abb2 am: 39000cbc73

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1954386

Change-Id: Ib066a914ea652a712d894665f002bae91f200514