Use NEON for CTS/SDK/VTS builds too (64-bit edition).

It's 2019 and the CDD has required NEON for many years now.

I've left unbundled apps alone for now.

I think the recent fix here for https://issuetracker.google.com/116070933
was incorrect. (I've commented on the bug.)

Test: treehugger
Change-Id: Ia02305cfdff9fd18a85359bc44d8eb9cab1413bd