Point HidlLazyUtils to init documentation. am: f38e3d71c3 am: d73a30e86e am: 82493c430c am: be8160b833

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/1391124

Change-Id: I42be980c29107bf4d91ba155c56b16f55f1618bc