Remote authenticator enrollment navigation.

This change adds an entry point for Remote Auth enrollment and
navigation through the flow.

Bug: b/293906345
Test: make RunSettingsRoboTests -j40
Change-Id: I9bc803e24c4181ed73a0ef90b171897c677e71d1

src/com/android/settings/remoteauth/RemoteAuthActivity.kt

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.remoteauth
+
+import android.os.Bundle
+
+import androidx.annotation.IdRes
+import androidx.navigation.fragment.NavHostFragment
+
+import com.android.settings.R
+import com.android.settings.SetupWizardUtils
+import com.android.settings.core.InstrumentedActivity
+import com.google.android.setupdesign.util.ThemeHelper
+
+open class RemoteAuthActivity : InstrumentedActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setTheme(SetupWizardUtils.getTheme(this, getIntent()))
+        ThemeHelper.trySetDynamicColor(this)
+        setContentView(R.layout.remote_auth_root)
+        // TODO(b/290768873): Change to remote_auth_enroll_introduction_fragment if no device is
+        // enrolled.
+        initializeNavigation(R.id.remote_auth_settings_fragment)
+    }
+
+    override fun getMetricsCategory(): Int {
+        // TODO() Update frameworks/proto_logging/stats/enums/app/settings_enums.proto
+        return 0
+    }
+
+    private fun initializeNavigation(@IdRes startDestinationId: Int) {
+        val navHostFragment =
+            supportFragmentManager.findFragmentById(R.id.nav_host_fragment) as NavHostFragment
+        val navController = navHostFragment.navController
+        val navGraph = navController.navInflater.inflate(R.navigation.remote_auth_navigation)
+        navGraph.setStartDestination(startDestinationId)
+        navController.graph = navGraph
+    }
+}