Move sepolicy for _touchflow targets.

Bug: 187654303
Test: touch reflector works on flame and redfin
Change-Id: I01f378b51d2d6bd77b6e4062e85b2d583899dce5
diff --git a/input/device.te b/input/device.te
new file mode 100644
index 0000000..d3ce622
--- /dev/null
+++ b/input/device.te
@@ -0,0 +1 @@
+type touch_offload_device, dev_type;