fix error when building android sample:

https://github.com/opencv/opencv/issues/7590

samples/android/CMakeLists.txt

@@ -18,8 +18,8 @@ add_subdirectory(tutorial-3-cameracontrol)
 # hello-android sample
 if(HAVE_opencv_highgui)
   add_executable(hello-android hello-android/main.cpp)
-  ocv_target_include_modules_recurse(hello-android opencv_imgcodecs opencv_videoio opencv_highgui opencv_core)
-  ocv_target_link_libraries(hello-android ${OPENCV_LINKER_LIBS} opencv_imgcodecs opencv_videoio opencv_highgui opencv_core)
+  ocv_target_include_modules_recurse(hello-android opencv_imgcodecs opencv_videoio opencv_highgui opencv_core opencv_imgproc)
+  ocv_target_link_libraries(hello-android ${OPENCV_LINKER_LIBS} opencv_imgcodecs opencv_videoio opencv_highgui opencv_core opencv_imgproc)
   set_target_properties(hello-android PROPERTIES OUTPUT_NAME hello-android RUNTIME_OUTPUT_DIRECTORY "${EXECUTABLE_OUTPUT_PATH}")
   add_dependencies(opencv_android_examples hello-android)
 endif()