Add suspend_resume trace events to the atrace 'freq' category.

Bug: 137289935
Test: Alongside selinux changes, recorded a trace using Traceur and
verified the tracepoints were included in the recorded trace.

Change-Id: I91e539cb53f4475d7da82e0da61d32d88b11b4ef
Merged-In: I91e539cb53f4475d7da82e0da61d32d88b11b4ef