fix:去除浮窗权限未获取toast提示；

android/src/main/java/in/jvapps/system_alert_window/MethodCallHandlerImpl.java

@@ -302,7 +302,7 @@ public class MethodCallHandlerImpl implements MethodChannel.MethodCallHandler, P
             Context mContext = ContextHolder.getApplicationContext();
             if (!Settings.canDrawOverlays(mContext)) {
                 LogUtils.getInstance().e(TAG, "System Alert Window will not work without 'Can Draw Over Other Apps' permission");
-                Toast.makeText(mContext, "System Alert Window will not work without 'Can Draw Over Other Apps' permission", Toast.LENGTH_LONG).show();
+//                Toast.makeText(mContext, "System Alert Window will not work without 'Can Draw Over Other Apps' permission", Toast.LENGTH_LONG).show();
             }
         }
         return false;