audio: Support new and old mixer paths locations

Change-Id: Ifa2a55cbfe45ab9d53cd23098012443f9b32ca31

audio/audio_hw.c

@@ -539,10 +539,15 @@ static int mixer_init(struct audio_device *adev)
                 }
             } while (mixer == NULL);
 
-            sprintf(mixer_path, "/system/etc/mixer_paths_%d.xml", card);
+            sprintf(mixer_path, "/vendor/etc/mixer_paths_%d.xml", card);
             if (access(mixer_path, F_OK) == -1) {
-                ALOGE("%s: Failed to load mixer paths from %s, your system is going to crash",
+                ALOGW("%s: Failed to open mixer paths from %s, retrying with legacy location",
                       __func__, mixer_path);
+                sprintf(mixer_path, "/system/etc/mixer_paths_%d.xml", card);
+                if (access(mixer_path, F_OK) == -1) {
+                    ALOGE("%s: Failed to load a mixer paths configuration, your system will crash",
+                          __func__);
+                }
             }
 
             audio_route = audio_route_init(card, mixer_path);