question

I'm looking for a source to find the resources which are used by Amazon Fire TV. I want to customize e.g. the colors of a simple AlertDialog. For stock Android I use the official GIT repository when I want to understand how it internally works. E.g. the inflated layout of a AlertDialog in stock Android is this xml file: https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/layout/alert_dialog.xml Where can I find the equivalent for Fire TV? I also downloaded all APK files from my FireTV to search for a binary version of the layout, but I could not find that resources there too. I'm sure I missed it somehow. I would be happy to get any input where Amazon stores that stuff.