Switch msm8956 to Audio HAL V6

Bug: 141989952
Test: atest VtsHalAudioV6_0TargetTest
      atest VtsHalAudioEffectV6_0TargetTest
            manual audio "smoke" test on taimen and walleye

Change-Id: Ieb1cc5c7fdcc5416a328a0a5c4a1996258b81ac8