adb: switch the socket list mutex to a recursive_mutex. am: 6f641adea5 am: a6b92d1f2e am: 1f8c6c8c8e am: 163802c244  -s ours
am: 46468f8cef

Change-Id: Ic01011008edb3481c0a4191aaf2f178e76c3458c