Migrate in-tree consumers of BNetworkDevice::GetNextNetwork to GetNetworks.

GetNextNetwork is very inefficient as it fetches all networks but only
returns one of them. GetNetworks was introduced to compensate for that,
but only the most regular consumers were initially migrated. Now,
the remaining consumers of the old API are converted to the new one.

libbnetapi: BUrlRequest now outputs to BDataIO

Previously, BUrlRequest returns data received via a callback that can't
return any value. This approach have several issues:

- It's not possible to signify failures to the request.
- Users have to implement custom listeners just to handle the common
case of outputting to a buffer/file/etc.
- The received data has to be serialized into BMessage when
BUrlProtocolDispatchingListener is employed. This can cause a
noticible slowdown in real-world scenarios as evident by #10748.

With this change, BUrlRequest will output directly into a BDataIO, which
exposes a richer API for request handlers to work with (for example a
BitTorrent client can request a BPositionIO for non-linear data
delivery), as well as simplifying common cases for users.

The adaptation only requires one additional API:
BHttpRequest::SetStopOnError(). This API simply instructs the HTTP
request handler to cancel the request if an HTTP error is occurred.

Change-Id: I4160884d77bff0e7678e0a623e2587987704443a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3084
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

libnetservices.a: move BGeoLocation from libshared.a

The BGeolocation class uses the network interface in libnetservices.a, so it
is moved here for now.

This will break any out of tree projects that depend on it, but it is a source
incompatible change only.

Change-Id: I6f5b1332eb87ad37dd33fbe09fdb11b16f7f26e4
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3670
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>