adbd: fix selinux denial in tunnel mode

Bug: 28053261
Test: boot cuttlefish in enforcing mode, use adb without adbd denials
Change-Id: I2e01339ffe7e19a13cada4cafbff647699109bca
diff --git a/shared/sepolicy/adbd.te b/shared/sepolicy/adbd.te
new file mode 100644
index 0000000..5614df2
--- /dev/null
+++ b/shared/sepolicy/adbd.te
@@ -0,0 +1,2 @@
+allow adbd self:socket create;
+allow adbd kernel:system module_request;