android/tester-ng: Fix structure members constness
android/tester-ng: Fix structure members constness

It's better to know what actually may change by looking at the structure
definitions. Some api calls can modify their parameters (returning file
descriptor in socket HAL API) but most of them don't.

This patch mostly applies to action_data and test_case structs that defines
the actual test case.

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