Added test printer for std::future_status.

Bug: 297082009
Test: run_zimperium_dev
Change-Id: I65904821de45a7d5bd515388dcaf9cace53a4893
(cherry picked from commit 61dd2b7951ace38a0710909928028144462db165)

libwvdrmengine/cdm/core/test/test_printers.h

@@ -7,6 +7,7 @@
 #ifndef CDM_TEST_PRINTERS_H_
 #define CDM_TEST_PRINTERS_H_
 
+#include <future>
 #include <iostream>
 
 #include "OEMCryptoCENC.h"
@@ -24,4 +25,9 @@ namespace okp {
 void PrintTo(const SystemState& state, std::ostream* os);
 }  // namespace okp
 }  // namespace wvcdm
+
+namespace std {
+void PrintTo(future_status status, ostream* os);
+}  // namespace std
+
 #endif  // CDM_TEST_PRINTERS_H_