Merge "aconfig: move CodegenMode to codegen crate" into main am: 8351b782...

Merge "aconfig: move CodegenMode to codegen crate" into main am: 8351b782 am: 0bd14fbe am: b05e1cc3

Original change: https://android-review.googlesource.com/c/platform/build/+/2883367



Change-Id: Ice625bd3821c0a1846a61aeba5f8d9d1b211965e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>