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

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

Change-Id: I8ac5cb54a211a18289faa177a7989447dcd45992
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>