This cl implements CommandSection and use it to add procrank.proto Section

Bug: 63863444
Test: manual - create gtests for CommandSection and Procrank Parser following
instructions in the README.md of incidentd and incident_helper on how to
run them.

Change-Id: I099808fd13bf9ed9a564b122f1126b1691a83291
diff --git a/cmds/incident_helper/Android.bp b/cmds/incident_helper/Android.bp
index 3ea823c..0532083 100644
--- a/cmds/incident_helper/Android.bp
+++ b/cmds/incident_helper/Android.bp
@@ -10,7 +10,7 @@
 
     srcs: [
         "IncidentHelper.cpp",
-        "strutil.cpp",
+        "ih_util.cpp",
     ],
 
     shared_libs: [
@@ -38,6 +38,7 @@
 
     srcs: [
         "tests/IncidentHelper_test.cpp",
+        "tests/ih_util_test.cpp",
     ],
 
     data: [