Merge branch 4.x

doc/tutorials/introduction/android_binary_package/android_dev_intro.markdown

@@ -9,6 +9,8 @@ Introduction into Android Development {#tutorial_android_dev_intro}
 | Original author | Rostislav Vasilikhin |
 | Compatibility | OpenCV >= 4.0 |
 
+@tableofcontents
+
 This guide was designed to help you in learning Android development basics and setting up your
 working environment quickly. It was tested with Ubuntu 22.04 and Windows 10.
 

doc/tutorials/introduction/android_binary_package/android_dnn_intro.markdown

@@ -12,6 +12,8 @@
 | Original author | Dmitry Kurtaev |
 | Compatibility | OpenCV >= 4.9 |
 
+@tableofcontents
+
 ## Introduction
 In this tutorial you'll know how to run deep learning networks on Android device
 using OpenCV deep learning module.

doc/tutorials/introduction/android_binary_package/android_ocl_intro.markdown

@@ -9,6 +9,8 @@ Use OpenCL in Android camera preview based CV application {#tutorial_android_ocl
 | Original author | Andrey Pavlenko, Alexander Panov |
 | Compatibility   | OpenCV >= 4.9 |
 
+@tableofcontents
+
 This guide was designed to help you in use of [OpenCL ™](https://www.khronos.org/opencl/) in Android camera preview based CV application.
 Tutorial was written for [Android Studio](http://developer.android.com/tools/studio/index.html) 2022.2.1. It was tested with Ubuntu 22.04.
 

doc/tutorials/introduction/android_binary_package/dev_with_OCV_on_Android.markdown

@@ -9,6 +9,8 @@ Android Development with OpenCV {#tutorial_dev_with_OCV_on_Android}
 | Original authors | Alexander Panov, Rostislav Vasilikhin |
 | Compatibility | OpenCV >= 4.9.0 |
 
+@tableofcontents
+
 This tutorial has been created to help you use OpenCV library within your Android project.
 
 This guide was checked on Ubuntu but contains no platform-dependent parts, therefore should be compatible with any OS supported by Android Studio and OpenCV4Android SDK.