Merge "aconfig: update rust code gen to use libflags_rust" am: 3b0ca61d

Original change: https://android-review.googlesource.com/c/platform/build/+/2607428



Change-Id: I5f100c044c906f06714ad1b4acbcbea83048a770
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>