ARTSPConnection: Digest Auth: Respect the realm sent by the server

Before this patch the fixed realm "Streaming Server" is used, which
leads to a wrongly calculated hash if the server expects a different
realm.

According to RFC2617 a server MUST send a realm.

Bug: 155686497
Change-Id: I954092bda7751e45217781cea3ada761f6e11335
2 files changed