Previously, there's only one Game Driver existed in the system, so we process
sphal libraries in GPU service to save the launch time for loading Game Driver.
Now we need to support a separate prerelease driver, so we have to move the
processing back to app launch time.
Bug: 134881329
Test: Manual test with prerelease driver and Settings UI.
Change-Id: Ic1bb412a6a026c68f55243c906bd56fe1fee44c3