trace: ipc_logging: Increase maximum size of logging context name

The current maximum length of an IPC Logging log context name is 20
characters. Some clients are now using names longer than this.

Increase the maximum length to 32. This change increases the IPC Logging
version to 3.

Change-Id: I9daecb8a7c6c3aea427efd1c75e307456e9c6c21
Signed-off-by: Steven Cahail <scahail@codeaurora.org>