contexthub-nano: Include headers for 4.4 kernels am: 2ad8a91c21

Original change: https://android-review.googlesource.com/c/device/google/contexthub/+/2781288

Change-Id: I23102557d9510085eaee9db0b2e7205d9d6c882e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>