sepolicy: add permission for AudioBT of pixelstats-vend.

Bug: 280248992
Test: Manually test passed
Change-Id: I431c135c1a1f515ce93251fe9b991e81d5f4fb57
diff --git a/audio/sepolicy/common/genfs_contexts b/audio/sepolicy/common/genfs_contexts
index deceeac..eaa0c71 100644
--- a/audio/sepolicy/common/genfs_contexts
+++ b/audio/sepolicy/common/genfs_contexts
@@ -20,3 +20,4 @@
 genfscon sysfs /devices/platform/audiometrics/call_count                    u:object_r:sysfs_pixelstats:s0
 genfscon sysfs /devices/platform/audiometrics/offload_effects_id            u:object_r:sysfs_pixelstats:s0
 genfscon sysfs /devices/platform/audiometrics/offload_effects_duration      u:object_r:sysfs_pixelstats:s0
+genfscon sysfs /devices/platform/audiometrics/bt_usage                      u:object_r:sysfs_pixelstats:s0