[cr144][Android] Fixed/got back interstitial page for http warning

Fixed the test HttpsUpgradeBrowserTest.CheckUpgrades.

Fixed interstitial warning when https only is allowed site. STR:
1. Open https://badssl.com/
2. Change Brave Shields settings to `Only connect with HTTPS`
3. Click http button, leads to http://http.badssl.com/
4. Change Brave Shields settings to `Only connect with HTTPS`
5. Go back
6. Click again http button, leads to http://http.badssl.com/
7. Expected to see interstitial page with warning, works so on cr143
7. Actual: just blank page.

Chromium change
https://source.chromium.org/chromium/chromium/src/+/2acf63007e896db6771b218c58a10b592089518f

	[HFM] Enable the new Ask-before-HTTP dialog UI by default

	This makes the new dialog UI the default for users who have HTTPS-First
	Mode enabled on Desktop, replacing the old full page interstitial UI.

	(The Android implementation will use a separate feature flag.)

	Bug: 351990829
	Change-Id: Ib13538bbfc79752ac64c8b956f0bbc28cd872c77
	Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7173972

app/BUILD.gn

@@ -181,6 +181,7 @@ source_set("unit_tests") {
       "//android_webview/common",
       "//chrome/browser/flags:flags_android",
       "//components/password_manager/core/common:features",
+      "//components/security_interstitials/core",
     ]
   } else {
     deps += [

app/DEPS

@@ -52,6 +52,7 @@ include_rules += [
   "+components/privacy_sandbox/privacy_sandbox_features.h",
   "+components/safe_browsing/core/common/features.h",
   "+components/search/ntp_features.h",
+  "+components/security_interstitials/core/features.h",
   "+components/segmentation_platform/public/features.h",
   "+components/shared_highlighting/core/common/shared_highlighting_features.h",
   "+components/signin/public/base/signin_buildflags.h",

app/feature_defaults_unittest.cc

@@ -70,6 +70,7 @@
 #if BUILDFLAG(IS_ANDROID)
 #include "android_webview/common/aw_features.h"
 #include "chrome/browser/flags/android/chrome_feature_list.h"
+#include "components/security_interstitials/core/features.h"
 #else
 #include "chrome/browser/sharing_hub/sharing_hub_features.h"
 #include "chrome/browser/ui/toasts/toast_features.h"
@@ -236,6 +237,9 @@ TEST(FeatureDefaultsTest, DisabledFeatures) {
       &safe_browsing::kClientSideDetectionClipboardCopyApi,
       &safe_browsing::kGooglePlayProtectInApkTelemetry,
       &safe_browsing::kNotificationTelemetry,
+#if BUILDFLAG(IS_ANDROID)
+      &security_interstitials::features::kHttpsFirstDialogUi,
+#endif
       &segmentation_platform::features::kSegmentationPlatformDeviceTier,
       &segmentation_platform::features::kSegmentationPlatformFeature,
       &segmentation_platform::features::kSegmentationPlatformTimeDelaySampling,

chromium_src/components/security_interstitials/core/features.cc

@@ -0,0 +1,21 @@
+/* Copyright (c) 2025 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#include "base/feature_override.h"
+#include "build/build_config.h"
+
+#include <components/security_interstitials/core/features.cc>
+
+namespace security_interstitials::features {
+
+#if BUILDFLAG(IS_ANDROID)
+OVERRIDE_FEATURE_DEFAULT_STATES({{
+    // Disable dialog UI on Android since Android doesn't have the dialog
+    // implementation and should use the full-page interstitial instead.
+    {kHttpsFirstDialogUi, base::FEATURE_DISABLED_BY_DEFAULT},
+}});
+#endif
+
+}  // namespace security_interstitials::features