binder: Change the error message when pm is not available. am: f82fbdc411 am: ef7622d8e2 am: 6d4dde6c1a am: 528f3493a3

Change-Id: I0493a88405aff6b0c6288a580da8760975f6ca55
diff --git a/src/binder/package_manager_remote.cc b/src/binder/package_manager_remote.cc
index 7cca2cf..bd20674 100644
--- a/src/binder/package_manager_remote.cc
+++ b/src/binder/package_manager_remote.cc
@@ -113,7 +113,9 @@
     if (count * interval >= timeout) {
       LOG(FATAL) << "Fail to create version map in "
                  << timeout.count()
-                 << " seconds.";
+                 << " milliseconds."
+                 << " Reason: Failed to connect to package manager service."
+                 << " Is system_server down?";
       return false;
     }
   }