Fix vibrator VTS failure on older HAL versions

Fix tests to expect STATUS_UNKNOWN_TRANSACTION as well as
EX_UNSUPPORTED_OPERATION when the vibrator does not have a capability
required for the method being tested.

Older versions of the HAL will return that status code instead of
unsupported, as explained at:
https://source.android.com/devices/architecture/aidl/stable-aidl#versioning-interfaces

Fix: 190526054
Test: VtsHalVibratorTargetTest & VtsHalVibratorManagerTargetTest
Change-Id: I538843fbbdbf8353cd57f1c83392baeabdcbadd2