[Saliency] Enable Java/Android bindings by adding 'WRAP java' to CMake

Fixes #4016

This addresses the inability to use the `saliency` module in Android (Java/Kotlin) applications.
When generated using `build_sdk.py`, the native library compiles, but the Java wrapper class (`org.opencv.saliency.Saliency`) is not generated.

**Technical Fix:** 
The `ocv_define_module` macro in `modules/saliency/CMakeLists.txt` was missing the `java` flag in its `WRAP` parameter.

**Change in `modules/saliency/CMakeLists.txt`:**

# OLD
ocv_define_module(saliency opencv_imgproc opencv_features2d WRAP python)

# NEW
ocv_define_module(saliency opencv_imgproc opencv_features2d WRAP python java)

Author: Akhil-Chaturvedi

modules/saliency/CMakeLists.txt

@@ -4,6 +4,6 @@ endif()
 
 set(the_description "Saliency API")
 
-ocv_define_module(saliency opencv_imgproc opencv_features2d WRAP python)
+ocv_define_module(saliency opencv_imgproc opencv_features2d WRAP python java)
 
 ocv_warnings_disable(CMAKE_CXX_FLAGS -Woverloaded-virtual)