Zero-initialize struct which contains kernel structs.

This one struct initialization results in two uninitialized
xfrm_address_t objects. Those objects are then filled in with correctly
initialized values. There is no bug here, but we should maintain struct
hygiene.

Bug: 65693875
Test: runtest -x system/netd/server/netd_unit_test.cpp
Change-Id: Ie61971f0965ce7054d5194ac8ca7991eee214a3e
diff --git a/server/XfrmController.cpp b/server/XfrmController.cpp
index ff07c49..ddfda5a 100644
--- a/server/XfrmController.cpp
+++ b/server/XfrmController.cpp
@@ -482,7 +482,7 @@
     ALOGD("remoteAddress=%s", remoteAddress.c_str());
     ALOGD("spi=%0.8x", spi);
 
-    XfrmSaId saId;
+    XfrmSaId saId{};
     netdutils::Status ret = fillXfrmSaId(direction, localAddress, remoteAddress, spi, &saId);
     if (!isOk(ret)) {
         return ret;