Use "root" aconfig module in all release configs

Remove the redundant copies of the aconfig flags from next and
trunk_food.  Ignore ap2a to reduce merge conflicts.

Bug: b/328495189
Test: croot build/tools/aconfig && atest --host
Ignore-AOSP-First: will manually push this
Change-Id: I88cb8047045b9563f3b72c3b146aeb70a6b1a323
15 files changed
tree: 7b9fdf5b7db04c937358562b4f3e184cfe9d484e
  1. aconfig/
  2. build_config/
  3. build_flags.scl
  4. OWNERS
  5. release_config_map.mk