Added CDM support for Watermarking reporting.

[ Merge of http://go/wvgerrit/148552 ]

Extended the CDM layer to report OEMCrypto's watermarking support.
The reporting of watermarking comes in three (3) mechanisms:
1) ClientCapabilities in license requests
2) CryptoSession metrics when queried to OEMCrypto
3) String property query by apps

If OEMCrypto implementents OEMCrypto_GetWatermarkingSupport(), then
the reported watermarking support by the CDM will match that of
OEMCrypto.

If OEMCrypto does not implement OEMCrypto_GetWatermarkingSupport()
or an error occurs, it is assumed that OEMCrypto does not support
watermarking, and the CDM will report "Not Supported".

Bug: 226443788
Test: run_x86_64_tests request_license_test and license_unittest
Change-Id: Id929a356c395e6bcf45d371ee6887eec40d35329

libwvdrmengine/src_hidl/wv_metrics.cpp

@@ -374,6 +374,9 @@ void FormatCryptoMetrics(const WvCdmMetrics_CryptoMetrics metrics,
   FORMAT_REPEATED_DISTRIBUTION(oemcrypto_load_provisioning_time_us, indent);
   FORMAT_OPTIONAL_VALUE(oemcrypto_minor_api_version, indent);
   FORMAT_OPTIONAL_VALUE(oemcrypto_maximum_usage_table_header_size, indent);
+
+  // OEMCrypto V17 metrics below.
+  FORMAT_OPTIONAL_VALUE(oemcrypto_watermarking_support, indent);
 }
 
 void FormatSessionMetrics(const WvCdmMetrics_SessionMetrics& metrics,