Delay OEMCrypto Termination

[ Merge of http://go/wvgerrit/89847 ]

This adds a platform specific property that allows OEMCrypto Termination
calls to be delayed. On android this allows a way to avoid
expensive back to back OEMCrypto_Terminate followed by Initialize
calls.

Bug: 136282358
Test: wv unit/integration tests
Change-Id: Ie5b4ff7503dafe77d974caac9c52fc1f169dec89

libwvdrmengine/cdm/include/properties_configuration.h

@@ -39,6 +39,11 @@ const bool kDeviceFilesIsARealFileSystem = true;
 // will be treated as a release request. If false, a restoration will fail.
 const bool kAllowRestoreOfflineLicenseWithRelease = false;
 
+// This controls whether an OEMCrypto_Terminate call is issued immediately
+// after crypto session count declines to 0 or if a termination is
+// delayed by a countdown timer. If false, termination is immediate.
+const bool kPropertyDelayOemCryptoTermination = true;
+
 }  // namespace wvcdm
 
 #endif  // CDM_BASE_WV_PROPERTIES_CONFIGURATION_H_