fix(mobile-next): 移除悬浮窗申请与位置发送，通话文案改为语音通话

同步完成后不再索取 SYSTEM_ALERT_WINDOW，去掉旧浮窗服务声明和定位权限/发送入口；历史位置消息仍只读展示。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile-next/openim_common/lib/src/utils/permissions.dart

@@ -10,10 +10,6 @@ import 'package:sprintf/sprintf.dart';
 class Permissions {
   Permissions._();
 
-  static Future<bool> checkSystemAlertWindow() async {
-    return Permission.systemAlertWindow.isGranted;
-  }
-
   static Future<bool> checkStorage() async {
     return await Permission.storage.isGranted;
   }
@@ -66,15 +62,6 @@ class Permissions {
     }
   }
 
-  static void location(Function()? onGranted) async {
-    if (await Permission.location.request().isGranted) {
-      onGranted?.call();
-    }
-    if (await Permission.location.isPermanentlyDenied || await Permission.location.isDenied) {
-      _showPermissionDeniedDialog(Permission.location.title);
-    }
-  }
-
   static void speech(Function()? onGranted) async {
     if (await Permission.speech.request().isGranted) {
       onGranted?.call();