Merge "Define __INTRODUCED_IN_LLNDK" into main am: fb97c97932 am: c73f61be26

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2975232

Change-Id: I8571beec87d2e1d132532b094732bac106983b5c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>