Refactor oemcrypto mock into stand alone reference code

Merge from Widevine repo of http://go/wvgerrit/46204
Refactor utility code - split the mock, step 1

Merge from Widevine repo of http://go/wvgerrit/46205
Move some OEMCrypto types to common header - split the mock, step 2

Merge from Widevine repo of http://go/wvgerrit/46206
Split mock into two -- step 3

Merge from Widevine repo of http://go/wvgerrit/47460
Split the mock into two -- step 3.5

The CL moves several files used by oemcrypto and cdm into a common
subdirectory, so that it may more easily be shared with partners.

The CORE_DISALLOW_COPY_AND_ASSIGN macro was moved to its own header in
the util/include directory.

This CL removes some references to the mock from other code, and puts
some constants and types, such as the definition of the keybox, into a
header in oemcrypto.

Test: tested as part of http://go/ag/4674759
bug: 76393338
Change-Id: I75b4bde7062ed8ee572c97ebc2f4da018f4be0c9

libwvdrmengine/oemcrypto/test/oemcrypto_test_main.cpp

@@ -4,7 +4,9 @@
 #include "OEMCryptoCENC.h"
 #include "log.h"
 #include "oec_device_features.h"
+#ifdef CDM_TESTS
 #include "properties.h"
+#endif
 
 static void acknowledge_cast() {
   std::cout
@@ -15,7 +17,9 @@ static void acknowledge_cast() {
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
+#ifdef CDM_TESTS
   wvcdm::Properties::Init();
+#endif
   wvcdm::g_cutoff = wvcdm::LOG_INFO;
   bool is_cast_receiver = false;
   bool force_load_test_keybox = false;