dumpsys: fix formatting of service dump times

The current formatting of service dump times is
confusing some bugreport parsing tools. This is
because the current service dump time message
is hard to distinguish from the bugreport section
marker.

Adjust the formatting, to make the service
dump time message distinct from the bugreport
section marker.

BUG=30401031
TEST=manual

Manual test
$ adb bugreport /tmp/bugreport.zip
$ cd /tmp
$ mkdir br
$ mv bugreport.zip br
$ cd br
$ grep 'was the duration' bugreport*.txt
------ 4.283s was the duration of 'DUMPSYS MEMINFO' ------
------ 0.053s was the duration of 'DUMPSYS CPUINFO' ------
[...many lines omitted...]
--------- 0.003s was the duration of dumpsys AtCmdFwd
--------- 0.002s was the duration of dumpsys DockObserver
[...many more lines omitted...]

Change-Id: I9d3dd75210b3984240a4b7ab49a1cc6124a269d8
diff --git a/cmds/dumpsys/dumpsys.cpp b/cmds/dumpsys/dumpsys.cpp
index 957a449..d19e98a 100644
--- a/cmds/dumpsys/dumpsys.cpp
+++ b/cmds/dumpsys/dumpsys.cpp
@@ -274,9 +274,8 @@
             if (N > 1) {
               std::chrono::duration<double> elapsed_seconds =
                   std::chrono::steady_clock::now() - start;
-              aout << StringPrintf("------ %.3fs was the duration of '", elapsed_seconds.count()).
-                  c_str();
-              aout << service_name << "' ------" << endl;
+              aout << StringPrintf("--------- %.3fs ", elapsed_seconds.count()).c_str()
+                   << "was the duration of dumpsys " << service_name << endl;
             }
         } else {
             aerr << "Can't find service: " << service_name << endl;