Add libbinderdebug

Allows lshal and dumpsys to share the code to get Binder PID info.

Test: atest libbinderdebug_test lshal_test
Test: diff output of lshal before and after this CL
Bug: 140639610
Change-Id: I04dbe2509673502502ac849ef4ae74147404fc43
12 files changed