Media tunneling may be not supported by more devices than the ones we
whitelisted before.
As a matter of fact, the list of devices on which media tunneling is disabled
could be not maintainable in the future, especially if the list of devices
grows more and more.
A preferable solution is to allow users to configure this setting themselves,
allowing them to not wait for their device(s) to be whitelisted in a future
NewPipe update.
This solution has been applied in this commit and works on every build type.
The corresponding preference in the debug settings has been of course removed
and the code used to prevent media tunneling activation on specific devices has
been removed.
a6ff85a208