Add ndk in Xcode13.0 stack

We do pre-install a NDK version already on our stacks

See: bitrise.io/osx-xcode-13.4.x.log at master 路 bitrise-io/bitrise.io 路 GitHub

If you need a different versions there is a community step you can use

- git::https://github.com/viktorbenei/bitrise-step-install-android-ndk-version.git@master:
        inputs:
        - android_ndk_version: r12b

See: GitHub - viktorbenei/bitrise-step-install-android-ndk-version: Bitrise step to install a specific Android NDK version.

Some more info about installing NDK here: How to install a specific Android NDK version on the Android/Linux stack