Merge changes I40a11748,I5e56f17f,Ie3748b6c,I4e1d56a8 into nyc-dev

am: d4af0d64

* commit 'd4af0d64':
  adb: use asocket's close function when closing.
  adb: switch the socket list mutex to a recursive_mutex.
  adb: clang-format sockets.cpp.
  adb: add implementations of mutex, recursive_mutex.

Change-Id: Ibb251966874a73e7ad745531ebad7b56c9c82e0d