refine test TestIpfwdEnableDisableStatusForwarding and some minor changes on test

1. fix flaky test for TestIpfwdEnableDisableStatusForwarding
2. fix time unit error in binder_test, set retry default
   interval as 50ms
3. refine naming in binder_test

Bug: 128533612
Test: built, flashed, booted
      system/netd/tests/runtests.sh pass

Change-Id: Ia03d0c30b49cdd233b627cce8bd2f3f05548798e
diff --git a/server/NetdNativeService.h b/server/NetdNativeService.h
index 09bf712..1bed73d 100644
--- a/server/NetdNativeService.h
+++ b/server/NetdNativeService.h
@@ -235,6 +235,7 @@
 
     // Ipfw-related commands
     binder::Status ipfwdEnabled(bool* status) override;
+    binder::Status ipfwdGetRequesterList(std::vector<std::string>* requesterList) override;
     binder::Status ipfwdEnableForwarding(const std::string& requester) override;
     binder::Status ipfwdDisableForwarding(const std::string& requester) override;
     binder::Status ipfwdAddInterfaceForward(const std::string& fromIface,