Misc Windows fixes.

(This is a merge of http://go/wvgerrit/70324)

- Add build settings for Windows.
- Conditionally add pthread.
- Add dummy DLLMain method.
- Fix #if checks for Windows.
- Remove designated initializers which aren't supported in MSVC.
- Remove variable length array.

Test: Android Unit Tests
Bug: 122953649
Change-Id: I14f16e7ce4b3ff17ee0139ea6c2f7243ae999aa1

libwvdrmengine/oemcrypto/test/oec_session_util.h

@@ -8,6 +8,7 @@
 // OEMCrypto unit tests
 //
 #include <openssl/rsa.h>
+#include <time.h>
 #include <string>
 #include <vector>
 

libwvdrmengine/oemcrypto/test/oemcrypto_test.cpp

@@ -1688,12 +1688,13 @@ TEST_P(SessionTestRefreshKeyTest, RefreshWithNoSelectKey) {
       num_keys_, wvoec::kControlNonceEnabled, s.get_nonce()));
   s.ServerSignBuffer(reinterpret_cast<const uint8_t*>(&s.encrypted_license()),
                      s.message_size(), &s.signature());
-  OEMCrypto_KeyRefreshObject key_array[num_keys_];
-  s.FillRefreshArray(key_array, num_keys_);
+  std::vector<OEMCrypto_KeyRefreshObject> key_array(num_keys_);
+  s.FillRefreshArray(key_array.data(), num_keys_);
   ASSERT_EQ(OEMCrypto_SUCCESS,
             OEMCrypto_RefreshKeys(s.session_id(), s.message_ptr(),
                                   s.message_size(), s.signature().data(),
-                                  s.signature().size(), num_keys_, key_array));
+                                  s.signature().size(), num_keys_,
+                                  key_array.data()));
   ASSERT_NO_FATAL_FAILURE(s.TestDecryptCTR(false));
   //  This should still be valid key, even if the refresh failed, because this
   //  is before the original license duration.