Use onUnlinked in health HAL am: 1e1627a5da am: b48ba49001

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

Change-Id: Icdbfa83cbf6338aada5d4b0d2f4348b2ed97387d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>