Override listening state for voice match training

While traning/retraining the voice model, override the hotword always on
state to true. Otherwise the training may fail when the device has no
Dsp support and disconnected to the power source.

Bug: b/139329513
Test: Manual Test
Change-Id: Ia1aeb93640935760271b045958d09109aa2826c8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1867180
Commit-Queue: Yue Li <updowndota@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707612}

chrome/browser/ui/webui/chromeos/login/assistant_optin_flow_screen_handler.cc

@@ -54,6 +54,8 @@ AssistantOptInFlowScreenHandler::AssistantOptInFlowScreenHandler(
 }
 
 AssistantOptInFlowScreenHandler::~AssistantOptInFlowScreenHandler() {
+  if (client_binding_)
+    StopSpeakerIdEnrollment();
   if (ash::AssistantState::Get())
     ash::AssistantState::Get()->RemoveObserver(this);
   if (screen_)

chromeos/services/assistant/assistant_manager_service_impl.h

@@ -206,6 +206,7 @@ class COMPONENT_EXPORT(ASSISTANT_SERVICE) AssistantManagerServiceImpl
   assistant_client::AssistantManagerInternal* assistant_manager_internal() {
     return assistant_manager_internal_;
   }
+  CrosPlatformApi* platform_api() { return platform_api_.get(); }
 
   // media_session::mojom::MediaControllerObserver overrides:
   void MediaSessionInfoChanged(

chromeos/services/assistant/assistant_settings_manager_impl.cc

@@ -12,6 +12,7 @@
 #include "chromeos/dbus/util/version_loader.h"
 #include "chromeos/services/assistant/assistant_manager_service_impl.h"
 #include "chromeos/services/assistant/constants.h"
+#include "chromeos/services/assistant/cros_platform_api.h"
 #include "chromeos/services/assistant/public/features.h"
 #include "chromeos/services/assistant/public/proto/assistant_device_settings_ui.pb.h"
 #include "chromeos/services/assistant/public/proto/settings_ui.pb.h"
@@ -126,6 +127,8 @@ void AssistantSettingsManagerImpl::StartSpeakerIdEnrollment(
   DCHECK(HasStarted(assistant_manager_service_));
   DCHECK(main_task_runner()->RunsTasksInCurrentSequence());
 
+  assistant_manager_service_->platform_api()->SetMicState(true);
+
   if (!assistant_manager_service_->assistant_manager_internal())
     return;
 
@@ -153,6 +156,8 @@ void AssistantSettingsManagerImpl::StopSpeakerIdEnrollment(
   DCHECK(HasStarted(assistant_manager_service_));
   DCHECK(main_task_runner()->RunsTasksInCurrentSequence());
 
+  assistant_manager_service_->platform_api()->SetMicState(false);
+
   if (!assistant_manager_service_->assistant_manager_internal()) {
     std::move(callback).Run();
     return;