hal: Update prefixes for audio system properties

Vendor created android system properties are required to have
vendor/qti prefix. Update vendor specific audio system
properties used in HAL.

CRs-Fixed: 2034869
Change-Id: Ibdb1d12fedee1ce12073e8b90fdec814318f3acf
diff --git a/hal/audio_extn/utils.c b/hal/audio_extn/utils.c
index e22cd1f..3052b23 100644
--- a/hal/audio_extn/utils.c
+++ b/hal/audio_extn/utils.c
@@ -678,7 +678,7 @@
         ALOGI("%s Allowing 24-bit playback on speaker ONLY at default sampling rate", __func__);
     }
 
-    property_get("audio.playback.mch.downsample",value,"");
+    property_get("vendor.audio.playback.mch.downsample",value,"");
     if (!strncmp("true", value, sizeof("true"))) {
         if ((popcount(channel_mask) > 2) &&
                 (sample_rate > CODEC_BACKEND_DEFAULT_SAMPLE_RATE) &&
@@ -879,7 +879,7 @@
 
     if ((usecase->type == PCM_PLAYBACK) && (usecase->stream.out != NULL)) {
 
-        property_get("audio.playback.mch.downsample",value,"");
+        property_get("vendor.audio.playback.mch.downsample",value,"");
         if (!strncmp("true", value, sizeof("true"))) {
             if ((popcount(usecase->stream.out->channel_mask) > 2) &&
                    (usecase->stream.out->app_type_cfg.sample_rate > CODEC_BACKEND_DEFAULT_SAMPLE_RATE) &&
@@ -1692,7 +1692,7 @@
     struct snd_compr_metadata metadata;
     int delay_ms = COMPRESS_OFFLOAD_PLAYBACK_LATENCY;
 
-    if (property_get_bool("audio.playback.dsp.pathdelay", false)) {
+    if (property_get_bool("vendor.audio.playback.dsp.pathdelay", false)) {
         ALOGD("%s:: Quering DSP delay %d",__func__, __LINE__);
         if (!(is_offload_usecase(out->usecase))) {
             ALOGE("%s:: not supported for non offload session", __func__);