Tried but did not solve the problem. On Oreo, OpenSL ES Hi-Res Output mentioned variant as 'Samsung UHQA', now it mentions variant as 'USB DAC/BT only'. My build number is G960FXXU2CRLO.
PA v3-build-816-play on Galaxy S9 Exynos. Updated to Pie stable today, and I cannot enable OpenSL ES Hi-Res for my headphones now. This was working fine when on Oreo. Help please @maxmp