Stop requiring the system symlink to be installed am: 5777fdd3a7

Original change: https://android-review.googlesource.com/c/platform/system/hwservicemanager/+/2839036

Change-Id: I3f66b90853ab0dd14eb44d3dbc6b7ed8b39be628
Signed-off-by: Automerger Merge Worker <[email protected]>