Added CDM support for production readiness reporting.

[ Merge of http://go/wvgerrit/151518 ]

Extended the CDM layer to report OEMCrypto's production readiness
via string property query.

If OEMCrypto implementents OEMCrypto_ProductionReady(), then the
reported readiness by the CDM will report "True" or "False".

If OEMCrypto does not implement OEMCrypto_ProductionReady() then no
level of readiness is assumed, and the CDM will report "Unknown".

Bug: 231655151
Test: run_prov30_tests and request_license_test
Change-Id: I6afe481ef00ac129d02b004eca89a65810bfbff8

libwvdrmengine/aidl_src/WVDrmFactory.cpp

@@ -238,6 +238,7 @@ void WVDrmFactory::printCdmProperties(int fd) {
       {"can disable analog output:",
        wvcdm::QUERY_KEY_CAN_DISABLE_ANALOG_OUTPUT},
       {"watermarking support:", wvcdm::QUERY_KEY_WATERMARKING_SUPPORT},
+      {"production ready:", wvcdm::QUERY_KEY_PRODUCTION_READY},
   };
 
   string value;