centralize common settings for edgeTPU

Bug: 258114806
Test: build pass with all the things still in the ROM
Change-Id: Iafa355c047d39cfb21ef043ed0e7b4108630b781
diff --git a/edgetpu/sepolicy/property.te b/edgetpu/sepolicy/property.te
new file mode 100644
index 0000000..ed93d44
--- /dev/null
+++ b/edgetpu/sepolicy/property.te
@@ -0,0 +1,4 @@
+# EdgeTPU service requires system public properties
+# since it lives under /system_ext/.
+system_public_prop(vendor_edgetpu_service_prop)
+