Uprev libxkbcommon to 1.4.0. am: a36f08b4c6 am: 28c13cad56

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libxkbcommon/+/17987629

Change-Id: I6477642658db9873089bb079a77c28876459be3f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>