sm8450-common: audio: Disable hfp

No device ships libhfp_pal on stock, so silence the following error:
08-26 09:13:26.159  1242  1242 E AHAL: AudioExtn: hfp_feature_init: 499: dlopen failed with: dlopen failed: library "/vendor/lib64/libhfp_pal.so" not found

Change-Id: Idf6b6f72f15b792dc5dfc95f24511bfbe54bdc69

properties/vendor.prop

@@ -33,7 +33,7 @@ vendor.audio.feature.a2dp_offload.enable=true
 vendor.audio.feature.afe_proxy.enable=true
 vendor.audio.feature.battery_listener.enable=true
 vendor.audio.feature.dmabuf.cma.memory.enable=true
-vendor.audio.feature.hfp.enable=true
+vendor.audio.feature.hfp.enable=false
 vendor.audio.feature.kpi_optimize.enable=true
 vendor.audio.flac.sw.decoder.24bit=true
 vendor.audio.hal.boot.timeout.ms=20000