system manifest: fix format

Test: pass
Change-Id: I82daf25ac90c5f401a2500c251b71fa9aa4e8756
diff --git a/vintfdata/manifest.xml b/vintfdata/manifest.xml
index 27919d3..e204671 100644
--- a/vintfdata/manifest.xml
+++ b/vintfdata/manifest.xml
@@ -53,7 +53,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-        <hal format="hidl">
+    <hal>
         <name>android.system.net.netd</name>
         <transport>hwbinder</transport>
         <version>1.1</version>