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
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 443f885..eaa84f5 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -170,6 +170,7 @@
         { OPT,      "events/clk/clk_disable/enable" },
         { OPT,      "events/clk/clk_enable/enable" },
         { OPT,      "events/power/cpu_frequency_limits/enable" },
+        { OPT,      "events/power/suspend_resume/enable" },
     } },
     { "membus",     "Memory Bus Utilization", 0, {
         { REQ,      "events/memory_bus/enable" },