Return correct results in StatsManager APIs

Test: manual
Change-Id: I12f392beb082a8919b85a4f617a616c8344c1e3a
diff --git a/cmds/statsd/src/StatsService.cpp b/cmds/statsd/src/StatsService.cpp
index 9259793..eb3ea0b 100644
--- a/cmds/statsd/src/StatsService.cpp
+++ b/cmds/statsd/src/StatsService.cpp
@@ -731,6 +731,7 @@
         *success = true;
         return Status::ok();
     } else {
+        *success = false;
         return Status::fromExceptionCode(binder::Status::EX_SECURITY);
     }
 }
@@ -740,6 +741,7 @@
     if (checkCallingPermission(String16(kPermissionDump))) {
         string keyStr = string(String8(key).string());
         mConfigManager->RemoveConfig(ConfigKey(ipc->getCallingUid(), keyStr));
+        *success = true;
         return Status::ok();
     } else {
         *success = false;