Merge "Revert "Reapply "release_config: build flags can be lists""" into main...

Merge "Revert "Reapply "release_config: build flags can be lists""" into main am: cc318d33 am: 9717c3fe am: a914569a

Original change: https://android-review.googlesource.com/c/platform/build/+/2818084



Change-Id: I330b64fb56465d4c2061e9f1770d3fc77b9f2f86
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>