Allow more time to attach an SCVH in tests

The test needs to spin up com.android.server.wm.scvh.embedded_service
and runs EmbeddedSCVHService to attach an SurfaceControlViewHost with
it. Considering that the test itself is also setting up the view
hierarchy and a SurfaceView in the main thread in the meanwhile, it may
need a rather long time to finish all the setup work on an emulator.

It uses the system property ro.hw_timeout_multiplier to allow more time
for slow devices like emulators, so that we don't have to relax the
limit back to 5s before the commit
2d219a813c3d2f39c219db04d384112ad276ca02 on real hardwares.

Bug: 275459006
Test: atest SurfaceSyncGroupContinuousTest on Cuttlefish PC
Change-Id: I1aa3e3d9d0c6f952ecbd131794fcc4e1f6564973
1 file changed