Merge pull request #24473 from alexlyulkov:al/samples_with_maven

Updated Android samples for modern Android studio. Added OpenCV from Maven support. #24473

Updated samples for recent Android studio:

- added namespace field that is required in build.gradle files
- replaced _switch_ by _if-else_ because it doesn't work with constants from resources
- added missed log library dependency in face-detection/jni/CMakeLists.txt
- use local.properties to define NDK location

Added support for OpenCV from Maven. Now you can choose 3 possible sources of OpenCV lib in settings.gradle: SDK path, local Maven repository, public Maven repository. (Creating Maven repository from SDK is added here #24456 )

There are differences in project configs for SDK and Maven versions:

- different dependencies in build.gradle
- different OpenCV library names in CMakeLists.txt
- SDK version requires OpenCV_DIR definition

Requires:
- https://github.com/opencv/ci-gha-workflow/pull/124
- https://github.com/opencv-infrastructure/opencv-gha-dockerfile/pull/26

samples/android/tutorial-2-mixedprocessing/jni/CMakeLists.txt

@@ -3,7 +3,12 @@ cmake_minimum_required(VERSION 3.6)
 set(target mixed_sample)
 project(${target} CXX)
 
-set(ANDROID_OPENCV_COMPONENTS "opencv_java" CACHE STRING "")
+if (OPENCV_FROM_SDK)
+  set(ANDROID_OPENCV_COMPONENTS "opencv_java" CACHE STRING "")
+else()
+  set(ANDROID_OPENCV_COMPONENTS "OpenCV::opencv_java${OPENCV_VERSION_MAJOR}" CACHE STRING "")
+endif()
+
 message(STATUS "ANDROID_ABI=${ANDROID_ABI}")
 find_package(OpenCV REQUIRED COMPONENTS ${ANDROID_OPENCV_COMPONENTS})