android/hal-ipc-api: HAL IPC uses 4 octects for socket channel
android/hal-ipc-api: HAL IPC uses 4 octects for socket channel

The documentations says that the HAL IPC uses 2 octets for socket
channels, while |struct hal_cmd_socket_{listen,connect}| contain 4
octets. This patch fixes the documentation accordingly.

pkarasev3/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,silent-snowman/bluez,pkarasev3/bluez,mapfau/bluez,mapfau/bluez,silent-snowman/bluez,pkarasev3/bluez,ComputeCycles/bluez,pkarasev3/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez