Add disabled code for minimal metrics reporting in cvd start

This is disabled by a compile-time constant. It uses the same
`CuttlefishLogEvent` type as the `host/commands/metrics` code.

The metrics messages sent are currently empty.

Bug: b/445773158

Author: Databean

base/cvd/cuttlefish/host/commands/cvd/cli/commands/BUILD.bazel

@@ -398,9 +398,13 @@ cf_cc_library(
         "//cuttlefish/host/commands/cvd/instances:cvd_persistent_data",
         "//cuttlefish/host/commands/cvd/instances:reset_client_utils",
         "//cuttlefish/host/commands/cvd/instances/lock",
+        "//cuttlefish/host/commands/cvd/metrics:is_enabled",
         "//cuttlefish/host/commands/cvd/utils",
+        "//cuttlefish/host/commands/metrics:libmetrics_utils",
+        "//cuttlefish/host/commands/metrics/proto:metrics_protos",
         "//cuttlefish/host/libs/config:config_constants",
         "//cuttlefish/host/libs/config:cuttlefish_config",
+        "//cuttlefish/host/libs/metrics:metrics_headers",
         "//libbase",
         "@fmt",
     ],

base/cvd/cuttlefish/host/commands/cvd/cli/commands/start.cpp

@@ -61,11 +61,15 @@
 #include "cuttlefish/host/commands/cvd/instances/lock/instance_lock.h"
 #include "cuttlefish/host/commands/cvd/instances/operator_client.h"
 #include "cuttlefish/host/commands/cvd/instances/reset_client_utils.h"
+#include "cuttlefish/host/commands/cvd/metrics/is_enabled.h"
 #include "cuttlefish/host/commands/cvd/utils/common.h"
 #include "cuttlefish/host/commands/cvd/utils/interrupt_listener.h"
 #include "cuttlefish/host/commands/cvd/utils/subprocess_waiter.h"
+#include "cuttlefish/host/commands/metrics/proto/cf_metrics_protos.h"
+#include "cuttlefish/host/commands/metrics/utils.h"
 #include "cuttlefish/host/libs/config/config_constants.h"
 #include "cuttlefish/host/libs/config/cuttlefish_config.h"
+#include "cuttlefish/host/libs/metrics/metrics_defs.h"
 
 namespace cuttlefish {
 namespace {
@@ -617,6 +621,43 @@ Result<void> CvdStartCommandHandler::LaunchDevice(
 
   CF_EXPECT(subprocess_waiter_.Setup(launch_command));
 
+  LOG(INFO)
+      << "By using this Android Virtual Device, you agree to Google Terms of "
+         "Service (https://policies.google.com/terms). The Google Privacy "
+         "Policy (https://policies.google.com/privacy) describes how Google "
+         "handles information generated as you use Google services.";
+  if (kEnableCvdMetrics) {
+    static constexpr int kLogSourceId = 1753;
+    static constexpr char kLogSourceStr[] = "CUTTLEFISH_METRICS";
+    static constexpr int kCppClientType =
+        19;  // C++ native client type (clientanalytics.proto)
+             //
+    LOG(INFO) << "This will automatically send diagnostic information to "
+                 "Google, such as crash reports and usage data from the host "
+                 "machine managing the Android Virtual Device.";
+    CuttlefishLogEvent cf_log_event;
+
+    cf_log_event.set_session_id("cvd-todo-session");
+
+    LogRequest request_proto;
+    request_proto.set_log_source(kLogSourceId);
+    request_proto.set_log_source_name(kLogSourceStr);
+
+    ClientInfo& client_info = *request_proto.mutable_client_info();
+    client_info.set_client_type(kCppClientType);
+
+    LogEvent& log_event = *request_proto.add_log_event();
+    log_event.set_event_time_ms(metrics::GetEpochTimeMs());
+    log_event.set_source_extension(cf_log_event.SerializeAsString());
+
+    std::string request_string = request_proto.SerializeAsString();
+    MetricsExitCodes reporting_outcome =
+        metrics::PostRequest(request_string, metrics::ClearcutServer::kProd);
+    if (reporting_outcome != MetricsExitCodes::kSuccess) {
+      LOG(ERROR) << "Issue reporting metrics: " << reporting_outcome;
+    }
+  }
+
   auto acloud_compat_action_result = AcloudCompatActions(group, envs, request);
   if (!acloud_compat_action_result.ok()) {
     LOG(ERROR) << acloud_compat_action_result.error().FormatForEnv();

base/cvd/cuttlefish/host/commands/cvd/metrics/BUILD.bazel

@@ -4,6 +4,11 @@ package(
     default_visibility = ["//:android_cuttlefish"],
 )
 
+cf_cc_library(
+    name = "is_enabled",
+    hdrs = ["is_enabled.h"],
+)
+
 cf_cc_library(
     name = "metrics",
     srcs = [

base/cvd/cuttlefish/host/commands/cvd/metrics/is_enabled.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+namespace cuttlefish {
+
+static constexpr bool kEnableCvdMetrics = false;
+
+}  // namespace cuttlefish

base/cvd/cuttlefish/host/commands/metrics/proto/cf_metrics_protos.h

@@ -22,7 +22,7 @@
 
 #pragma GCC system_header
 
-#include "cuttlefish/host/commands/metrics/proto/cf_log.pb.h"
-#include "cuttlefish/host/commands/metrics/proto/cf_metrics_event.pb.h"
-#include "cuttlefish/host/commands/metrics/proto/clientanalytics.pb.h"
-#include "cuttlefish/host/commands/metrics/proto/common.pb.h"
+#include "cuttlefish/host/commands/metrics/proto/cf_log.pb.h"  // IWYU pragma: export
+#include "cuttlefish/host/commands/metrics/proto/cf_metrics_event.pb.h"  // IWYU pragma: export
+#include "cuttlefish/host/commands/metrics/proto/clientanalytics.pb.h"  // IWYU pragma: export
+#include "cuttlefish/host/commands/metrics/proto/common.pb.h"  // IWYU pragma: export