[DO NOT MERGE] vts: Fix for setProp in VtsHalAutomotiveVehicleV2_0TargetTest

setProp test, sets READ_WRITE property and reads prop value immediately,
without considering the time delay Vehicle HAL service required to process
the set request.
This is handled by a retry and timeout mechanism, where the read trials
will happen in 500 milliseconds for a timeout of 2 seconds.

Bug: 312265787
Test: VtsHalAutomotiveVehicleV2_0TargetTest
Change-Id: I5db6d724710033f271064ac81c5178f0dec74b26