[automerger skipped] HidlLazyUtils: avoid race w/ register & onClients am: 8578d50d84 am: 390007d990 -s ours

am skip reason: Merged-In Ia430352db4fb1345ba3e6633e3918b441af24fd7 with SHA-1 8578d50d84 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/libhidl/+/15132861

Change-Id: I8777ac1adc22048a6a7c53c5eb2658b50fba18dc