adb: switch the socket list mutex to a recursive_mutex. am: d21f70ddc7 am: f9256e5a16 am: 1f8c6c8c8e am: fd09d1bb33  -s ours
am: e83bdf0119

Change-Id: Ic01011008edb3481c0a4191aaf2f178e76c3458c