Change NoHwServiceManager to return EMPTY instead of PASSTHROUGH am: adbf9a543f am: 487b966eb0 am: df6c1f5568

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2617538

Change-Id: I3a2cc392c64955bed5b18d1aacfcbd08d8bc34db
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>