AudioFlinger: Check Effect HAL version for device effect compatibility

Add missing check on Effect HAL version to determine if an
implementaiton supports device effects. Only HALs after V 6.0
support this feature.

Bug: 164077570
Test: atest DeviceEffectTest#testCreateDeviceEffect
Change-Id: I9a72ed92a07099e9bad10cdf4474c7b918dce121