Change NoHwServiceManager to return EMPTY instead of PASSTHROUGH am: adbf9a543f

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

Change-Id: I8de6a762e1ff18869d5651de916808be33c22053
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>