hwservicemanager: actually restart hals

Note still waiting on b/35730318 to make sure this works properly.

Note, this change is only required after:
https://android-review.googlesource.com/q/topic:%2522hwservicemanager-early-start%2522+(status:open%20OR%20status:merged)

Test: can see hals restart in lshal after killing hwservicemanager.
Bug: 34093663
Change-Id: I70c19443937c575050afec7b14d95058db203245
1 file changed