Add Oemcrypto build information to metrics.

Import from http://go/wvgerrit/68385

Adds the build information returned from OEMCrypto_BuildInformation()
to the CDM session metrics.

Bug: 117117555
Test: Unit tests. GPlay manual. GTS Tests.
Change-Id: I505c46fec61a7c62538f843185ec0358f860da79

libwvdrmengine/cdm/metrics/src/metrics_collections.cpp

@@ -177,6 +177,8 @@ void SessionMetrics::SerializeSessionMetrics(
       session_metrics->mutable_cdm_session_restore_usage_session());
   cdm_session_license_request_latency_ms_.ToProto(
       session_metrics->mutable_cdm_session_license_request_latency_ms());
+  session_metrics->set_allocated_oemcrypto_build_info(
+      oemcrypto_build_info_.ToProto());
 }
 
 OemCryptoDynamicAdapterMetrics::OemCryptoDynamicAdapterMetrics()