Update unittest expectations for Android

We're using different user/group and file path on Android, so update
these expectations in unittest for Android.

While there, rename apmanager_unittest to apmanager_test, which seems
to be the convention for unittest target name on Android.

Bug: 24707201
TEST=Run unittest on dragonboard
TEST=Run unittest for Chrome OS

Change-Id: Ibd6880a713117578b68c814edc7e1cefe9170c75
diff --git a/dhcp_server.cc b/dhcp_server.cc
index 5531f0d..ab7b634 100644
--- a/dhcp_server.cc
+++ b/dhcp_server.cc
@@ -138,12 +138,12 @@
   // terminated. Configure dnsmasq to run in "foreground" so no extra process
   // will be spawned.
   config += "keep-in-foreground\n";
-  // Explicitly set the user to apmanager. If not set, dnsmasq will default to
-  // run as "nobody".
-  base::StringAppendF(&config, "user=%s\n", Daemon::kAPManagerUserName);
   base::StringAppendF(
       &config, "dhcp-range=%s,%s\n", address_low.c_str(), address_high.c_str());
   base::StringAppendF(&config, "interface=%s\n", interface_name_.c_str());
+  // Explicitly set the user to apmanager. If not set, dnsmasq will default to
+  // run as "nobody".
+  base::StringAppendF(&config, "user=%s\n", Daemon::kAPManagerUserName);
   base::StringAppendF(&config, "dhcp-leasefile=%s\n", lease_file_path.c_str());
   return config;
 }