[automerger skipped] Move env var config loading to be within the config...

[automerger skipped] Move env var config loading to be within the config package. am: 2f504db7 am: 4d5f00fe am: 14325e74 am: 5da91781 am: c81a6e75 -s ours

am skip reason: Merged-In Iab3957b64f4b5456a861057d16ad318f4f78e0cb with SHA-1 3ff037e3 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/18971604



Change-Id: Iba154dccc2e80d5837c97dbc8e7316ffbf9553fd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>