sepolicy: Add rules for /dev/dma_heap/qcom,demura device

Define policy for qcom,demura device.

Change-Id: I1264329ecea1349f5fb78919644c02fd0bc552f2
diff --git a/generic/vendor/common/device.te b/generic/vendor/common/device.te
index 0f45ea0..1119120 100644
--- a/generic/vendor/common/device.te
+++ b/generic/vendor/common/device.te
@@ -59,6 +59,7 @@
 type vendor_dmabuf_qseecom_ta_heap_device, dmabuf_heap_device_type, dev_type;
 type vendor_dmabuf_display_heap_device, dmabuf_heap_device_type, dev_type;
 type vendor_dmabuf_audio_ml_heap_device, dmabuf_heap_device_type, dev_type;
+type vendor_dmabuf_demura_heap_device, dmabuf_heap_device_type, dev_type;
 
 type vendor_membuf_dev, dev_type;