SE Policy for Tether Offload HAL

Update SE Policy to allow calls to and callbacks for the Tether Offload HAL
HIDL binderized service.

Bug: 38417260
Test: New functionality. So we don't have any tests.
Change-Id: I2c95b290523c55c081afa1bca091f368559c9125
(cherry picked from commit 722249b3)

private/system_server.te

@@ -186,6 +186,7 @@ allow system_server hal_omx_hwservice:hwservice_manager find;
 allow system_server hidl_token_hwservice:hwservice_manager find;
 hal_client_domain(system_server, hal_power)
 hal_client_domain(system_server, hal_sensors)
+hal_client_domain(system_server, hal_tetheroffload)
 hal_client_domain(system_server, hal_thermal)
 hal_client_domain(system_server, hal_tv_cec)
 hal_client_domain(system_server, hal_tv_input)

public/attributes

@@ -234,6 +234,9 @@ attribute hal_sensors_server;
 attribute hal_telephony;
 attribute hal_telephony_client;
 attribute hal_telephony_server;
+attribute hal_tetheroffload;
+attribute hal_tetheroffload_client;
+attribute hal_tetheroffload_server;
 attribute hal_thermal;
 attribute hal_thermal_client;
 attribute hal_thermal_server;

public/hal_tetheroffload.te

+## HwBinder IPC from client to server, and callbacks
+binder_call(hal_tetheroffload_client, hal_tetheroffload_server)
+binder_call(hal_tetheroffload_server, hal_tetheroffload_client)