Android: Read preferred NDK version from modules/Core.json

From Qt 6.5 on, Qt's build system adds the Android API version and NDK version which this Qt was built with to modules/Core.json.

[...]
    "built_with": {
        "android": {
            "api_version": "android-31",
            "ndk": {
                "version": "25.1.8937393"
            }
        },
[...]

Qt Creator will parse this file and if the data is successfully obtained, it will override what Qt Creator traditionally reads from its very own sdk_definitions.json