Audio V4 VTS: test setter even if getter is NOT_SUPPORTED

Previously, the setter of optional properties were not tested
if the getter was not supported.
This was an issue as the framework rarely gets, most
often only sets as it consider having the ownership of those properties.
Thus implementation tend to only support set.

As a result optional setter were not tested although called by the
framework.

For example the default impl setTtyMode has a bug that was not detected
because the Pixel HAL does not support getTtyMode.

This patch makes sure to always test getter and setter.

Test: atest VtsHalAudioV4_0TargetTest
Bug: 71486871
Change-Id: Ib0b03fb6eb77cc0428a33eb463166dd7c339bd3d
Signed-off-by: Kevin Rocard <krocard@google.com>