Products launching with API 28 need 64-bit binder interface.

This time around we're really deprecating the 32-bit
binder interface (v7), even for 32-bit devices.

Upgrading devices can keep using it.

Bug: 69775513
Test: manual makefile prodding
Change-Id: I3850418ca267e72593f5f12b940e5382b29b024a