Revert "Revert "Added a bionic systrace class and tracing to pthread_mutex.cpp.""

This reverts commit 26c1420fbb68916d66a8621b5efe8bb25cfdad7b.

(cherry picked from commit 9e87f2f876243225deef37645ddceaa5d225cb41)

Change-Id: I46a71a456952e3dd2c2bb0d9934820ffe8dc8469
4 files changed