Fix OpenSSL Builds

(This is a merge of the parts of http://go/wvgerrit/105985 that affect
Android.)

This patch fixes some files that, after recent changes, were no longer
building when using OpenSSL instead of BoringSSL. <memory> was missing
in a header, and a function whose return type is different on OpenSSL
was tripping up the format-string warnings.

Bug: 168553979
Test: jenkins/ce_cdm_tests
Test: Android CDM Build
Change-Id: Id6a33d0ce0d3cbe5fe33b3f22aa3ee6b03ac76dd

libwvdrmengine/oemcrypto/ref/src/oemcrypto_usage_table_ref.h

@@ -9,6 +9,7 @@
 
 #include <stdint.h>
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>