Move nav parameters to tests

... to make the test configuration more visible.

More background is here:
https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/34704361/comment/77f2b6ff_029cf8b9/

Test: build
Bug: 396020056
Flag: TEST_ONLYi

Change-Id: Ic5316697e06a32ea9975ca551269f8735bcff444