Update logic for launching vocie enrollment flow

If activity control consent has not been accepted, launch the Assistant
opt-in flow instead of voice enrollment flow.

Bug: None
Test: Manual Test
Change-Id: I3960715e17422b11c073942575c96557c2747112
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1500849Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Commit-Queue: Yue Li <updowndota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#638015}

ash/assistant/assistant_controller.cc

@@ -102,8 +102,18 @@ void AssistantController::OpenAssistantSettings() {
 }
 
 void AssistantController::StartSpeakerIdEnrollmentFlow() {
-  setup_controller()->StartOnboarding(false /* relaunch */,
-                                      mojom::FlowType::SPEAKER_ID_ENROLLMENT);
+  mojom::ConsentStatus consent_status =
+      Shell::Get()->voice_interaction_controller()->consent_status().value_or(
+          mojom::ConsentStatus::kUnknown);
+  if (consent_status == mojom::ConsentStatus::kActivityControlAccepted) {
+    // If activity control has been accepted, launch the enrollment flow.
+    setup_controller()->StartOnboarding(false /* relaunch */,
+                                        mojom::FlowType::SPEAKER_ID_ENROLLMENT);
+  } else {
+    // If activity control has not been accepted, launch the opt-in flow.
+    setup_controller()->StartOnboarding(false /* relaunch */,
+                                        mojom::FlowType::CONSENT_FLOW);
+  }
 }
 
 void AssistantController::DownloadImage(