Use onUnlinked in health HAL am: 1e1627a5da am: f4eac52813

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/27145126

Change-Id: Ifcf22db739b5c16a3a4802b59f511e24500355c6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>