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/service_unittest.cc b/service_unittest.cc
index db13d80..509b9a0 100644
--- a/service_unittest.cc
+++ b/service_unittest.cc
@@ -49,7 +49,11 @@
   const char kHostapdConfig[] = "ssid=test\n";
   const char kBinSleep[] = "/bin/sleep";
   const char kHostapdConfigFilePath[] =
+#if !defined(__ANDROID__)
       "/var/run/apmanager/hostapd/hostapd-1.conf";
+#else
+      "/data/misc/apmanager/hostapd/hostapd-1.conf";
+#endif  // __ANDROID__
 }  // namespace
 
 namespace apmanager {