Add test for profiler CPU guardrail.

Change-Id: Ic71014e148bbc7f4b56ba97d18141527feba9ee2
diff --git a/Android.bp b/Android.bp
index f174c13..80358ff 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6537,6 +6537,7 @@
   srcs: [
     "src/profiling/common/interner_unittest.cc",
     "src/profiling/common/proc_utils_unittest.cc",
+    "src/profiling/common/profiler_guardrails_unittest.cc",
   ],
 }