feat: Hide "Install as Root" button if user does not have root access at all

lib/services/root_api.dart

@@ -5,6 +5,15 @@ class RootAPI {
   final String _postFsDataDirPath = '/data/adb/post-fs-data.d';
   final String _serviceDDirPath = '/data/adb/service.d';
 
+  Future<bool> isRooted() async {
+    try {
+      bool? isRooted = await Root.isRootAvailable();
+      return isRooted != null && isRooted;
+    } on Exception {
+      return false;
+    }
+  }
+
   Future<bool> hasRootPermissions() async {
     try {
       bool? isRooted = await Root.isRootAvailable();

lib/ui/views/installer/installer_view.dart

@@ -106,7 +106,7 @@ class InstallerView extends StatelessWidget {
                             ),
                           ),
                           Visibility(
-                            visible: !model.isInstalled,
+                            visible: !model.isInstalled && model.isRooted,
                             child: CustomMaterialButton(
                               isFilled: false,
                               label:

lib/ui/views/installer/installer_viewmodel.dart

@@ -1,3 +1,4 @@
+// ignore_for_file: use_build_context_synchronously
 import 'package:device_apps/device_apps.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -9,6 +10,7 @@ import 'package:revanced_manager/models/patch.dart';
 import 'package:revanced_manager/models/patched_application.dart';
 import 'package:revanced_manager/services/manager_api.dart';
 import 'package:revanced_manager/services/patcher_api.dart';
+import 'package:revanced_manager/services/root_api.dart';
 import 'package:revanced_manager/services/toast.dart';
 import 'package:revanced_manager/ui/views/patcher/patcher_viewmodel.dart';
 import 'package:revanced_manager/ui/widgets/shared/custom_material_button.dart';
@@ -18,6 +20,7 @@ import 'package:wakelock/wakelock.dart';
 class InstallerViewModel extends BaseViewModel {
   final ManagerAPI _managerAPI = locator<ManagerAPI>();
   final PatcherAPI _patcherAPI = locator<PatcherAPI>();
+  final RootAPI _rootAPI = RootAPI();
   final Toast _toast = locator<Toast>();
   final PatchedApplication _app = locator<PatcherViewModel>().selectedApp!;
   final List<Patch> _patches = locator<PatcherViewModel>().selectedPatches;
@@ -28,11 +31,13 @@ class InstallerViewModel extends BaseViewModel {
   double? progress = 0.0;
   String logs = '';
   String headerLogs = '';
+  bool isRooted = false;
   bool isPatching = true;
   bool isInstalled = false;
   bool hasErrors = false;
 
   Future<void> initialize(BuildContext context) async {
+    isRooted = await _rootAPI.isRooted();
     if (await Permission.ignoreBatteryOptimizations.isGranted) {
       try {
         FlutterBackground.initialize(