CMake: Add Android's prepare_apk_dir target to ALL

Since Qt Creator uses androiddeployqt custom commands it still needs a
step to prepare the apk dir before building it, so add this to ALL
to avoid having to call it manually in creator.

Pick-to: 6.1
Change-Id: I0a2816244589e9b296a326fcc1abf8c08aabfea7
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

src/corelib/Qt6AndroidMacros.cmake

@@ -302,10 +302,10 @@ function(qt6_android_add_apk_target target)
     set(apk_intermediate_file_path "${apk_intermediate_dir}/${apk_file_name}")
 
     # This target is used by Qt Creator's Android support.
-    add_custom_target(${target}_prepare_apk_dir
+    add_custom_target(${target}_prepare_apk_dir ALL
         DEPENDS ${target}
         COMMAND ${CMAKE_COMMAND}
-            -E copy $<TARGET_FILE:${target}>
+            -E copy_if_different $<TARGET_FILE:${target}>
             "${apk_final_dir}/libs/${CMAKE_ANDROID_ARCH_ABI}/$<TARGET_FILE_NAME:${target}>"
         COMMENT "Copying ${target} binary to apk folder"
     )