Fix a crash when SegmentationPlatform is disabled

BringYourOwnTabsIOS feature depends on SegmentationPlatform and crashes
if the latter is disabled. This CL fixes that by adding a feature check
before building `BringAndroidTabsToIOSService`.

Addtionally, the service is not built when BringYourOwnTabsIOS itself is
disabled.

"--disable-features=SegmentationPlatform"

Test: run in the ios simulator with
Bug: 1474365
Change-Id: I0b0854e0621835a081fccdbd18f777add0367993
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4798048
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1187175}

ios/chrome/browser/bring_android_tabs/bring_android_tabs_to_ios_service_factory.mm

@@ -4,10 +4,13 @@
 
 #import "ios/chrome/browser/bring_android_tabs/bring_android_tabs_to_ios_service_factory.h"
 
+#import "base/feature_list.h"
 #import "components/keyed_service/ios/browser_state_dependency_manager.h"
 #import "components/pref_registry/pref_registry_syncable.h"
 #import "components/segmentation_platform/embedder/default_model/device_switcher_result_dispatcher.h"
+#import "components/segmentation_platform/public/features.h"
 #import "ios/chrome/browser/bring_android_tabs/bring_android_tabs_to_ios_service.h"
+#import "ios/chrome/browser/bring_android_tabs/features.h"
 #import "ios/chrome/browser/first_run/first_run.h"
 #import "ios/chrome/browser/segmentation_platform/segmentation_platform_service_factory.h"
 #import "ios/chrome/browser/shared/model/browser_state/chrome_browser_state.h"
@@ -60,6 +63,13 @@
 std::unique_ptr<KeyedService>
 BringAndroidTabsToIOSServiceFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
+  // SegmentationPlatform is required for BringYourOwnTabsIOS to work.
+  if (!base::FeatureList::IsEnabled(kBringYourOwnTabsIOS) ||
+      !base::FeatureList::IsEnabled(
+          segmentation_platform::features::kSegmentationPlatformFeature)) {
+    return nullptr;
+  }
+
   ChromeBrowserState* browser_state =
       ChromeBrowserState::FromBrowserState(context);
   PrefService* browser_state_prefs =