Add notification troubleshoot test about blocked users.

libraries/troubleshoot/test/build.gradle.kts

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+plugins {
+    id("io.element.android-library")
+}
+
+android {
+    namespace = "io.element.android.libraries.troubleshoot.test"
+}
+
+dependencies {
+    implementation(projects.libraries.troubleshoot.api)
+    implementation(projects.tests.testutils)
+}

libraries/troubleshoot/test/src/main/kotlin/io/element/android/libraries/troubleshoot/test/FakeNotificationTroubleshootNavigator.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.troubleshoot.test
+
+import io.element.android.libraries.troubleshoot.api.test.NotificationTroubleshootNavigator
+import io.element.android.tests.testutils.lambda.lambdaError
+
+class FakeNotificationTroubleshootNavigator(
+    private val openIgnoredUsersResult: () -> Unit = { lambdaError() },
+) : NotificationTroubleshootNavigator {
+    override fun openIgnoredUsers() = openIgnoredUsersResult()
+}