[Bug]: Data Channels Should Have Symmetric Reliability By Default

[geoffviola]

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Describe the bug

When a peer initiates a connection, the default behavior is to ignore the reliability data. Therefore, the reliability is defaulted to reliable and ordered.

rfc8832 states

. Protocol Overview

The Data Channel Establishment Protocol is a simple, low-overhead way
to establish bidirectional data channels over an SCTP association
with a consistent set of properties.

The set of consistent properties includes:

• reliable or unreliable message transmission. In case of
  unreliable transmissions, the same level of unreliability is used.

Other libraries like pion datachannel do read those bytes. They set the reliability to be symmetric by default.

Expected Behavior

It's expected for the default data channel reliability to have symmetric reliability.

Current Behavior

It's currently set to reliable and ordered.

Reproduction Steps

Create data channel via peer connection. Check the reliability of the outgoing data channel.

WebRTC C SDK version being used

v1.7.3

If it was working in a previous version, which one?

No response

Compiler and Version used

Clang 15

Operating System and version

Ubuntu 22.04.5 LTS

Platform being used

x86_64