Use statusToString for status_t print.

Since it requires a few steps to realize '-2147483646' means
FAILED_TRANSACTION, for instance.

Bug: 145776393
Test: dumpsys, w/ error during transaction
Change-Id: I895b873c229c04ac4e7d90a566a1b27d44404da1
diff --git a/cmds/dumpsys/dumpsys.cpp b/cmds/dumpsys/dumpsys.cpp
index abdf168..5597bcd 100644
--- a/cmds/dumpsys/dumpsys.cpp
+++ b/cmds/dumpsys/dumpsys.cpp
@@ -364,7 +364,7 @@
         }
 
         if (err != OK) {
-            aerr << "Error dumping service info status_t: (" << err << ") "
+            aerr << "Error dumping service info status_t: " << statusToString(err) << " "
                  << serviceName << endl;
         }
     });