Add a field indicating online vs offline licenses.

Import of http://go/wvgerrit/68188

This adds an attribute to metrics indicating if the license was online
or offline.

Also, added a unit test for CdmEngineMetricsImpl.

Test: Unit tests. GPlay manual. GTS tests.
Bug: 115523917

Change-Id: Id315c643048914a2c51904451f9665987bc87eb7

libwvdrmengine/mediadrm/src_hidl/hidl_metrics_adapter.cpp

@@ -30,6 +30,7 @@ const char kAttributeOemCryptoResult[] = "oem_crypto_result";
 const char kAttributeKeyStatusType[] = "key_status_type";
 const char kAttributeEventType[] = "event_type";
 const char kAttributeKeyRequestType[] = "key_request_type";
+const char kAttributeLicenseType[] = "license_type";
 
 template<typename T>
 void SetValue(const T& value, DrmMetricGroup::Attribute* attribute);
@@ -237,6 +238,12 @@ void HidlMetricsGroupBuilder::AddAttributes(
         DrmMetricGroup::ValueType::INT64_TYPE,
         attributes_proto.key_request_type(), &attribute_vector);
   }
+  if (attributes_proto.has_license_type()) {
+    AddAttribute(
+        kAttributeLicenseType,
+        DrmMetricGroup::ValueType::INT64_TYPE,
+        attributes_proto.license_type(), &attribute_vector);
+  }
 
   *attributes = attribute_vector;
 }