Slightly improve TrafficController dump output.

Before:
      current ownerMatch configuration: 28
      current statsMap configuration: 0

After:
      current ownerMatch configuration: 28 DOZABLE_MATCH STANDBY_MATCH POWERSAVE_MATCH
      current statsMap configuration: 0 SELECT_MAP_A

Test: adb shell dumpsys netd trafficcontroller
Change-Id: I5649d5f5a52e7e19be4460bb2f9861334ac60409
diff --git a/server/TrafficController.cpp b/server/TrafficController.cpp
index f7d2463..f3a2740 100644
--- a/server/TrafficController.cpp
+++ b/server/TrafficController.cpp
@@ -1074,15 +1074,28 @@
     uint32_t key = UID_RULES_CONFIGURATION_KEY;
     auto configuration = mConfigurationMap.readValue(key);
     if (isOk(configuration)) {
-        dw.println("current ownerMatch configuration: %d", configuration.value());
+        dw.println("current ownerMatch configuration: %d%s", configuration.value(),
+                   uidMatchTypeToString(configuration.value()).c_str());
     } else {
         dw.println("mConfigurationMap read ownerMatch configure failed with error: %s",
                    configuration.status().msg().c_str());
     }
+
     key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
     configuration = mConfigurationMap.readValue(key);
     if (isOk(configuration)) {
-        dw.println("current statsMap configuration: %d", configuration.value());
+        const char* statsMapDescription = "???";
+        switch (configuration.value()) {
+            case SELECT_MAP_A:
+                statsMapDescription = "SELECT_MAP_A";
+                break;
+            case SELECT_MAP_B:
+                statsMapDescription = "SELECT_MAP_B";
+                break;
+                // No default clause, so if we ever add a third map, this code will fail to build.
+        }
+        dw.println("current statsMap configuration: %d %s", configuration.value(),
+                   statsMapDescription);
     } else {
         dw.println("mConfigurationMap read stats map configure failed with error: %s",
                    configuration.status().msg().c_str());