protocol-native: Don't signal memfd support for 9.0 clients

protocol-native: Don't signal memfd support for 9.0 clients

Although such 9.0 clients support memfd transport, they have an
iochannel bug that would break memfd audio if they're run in 32
bit mode over a 64-bit kernel. Influence them to use the POSIX
shared memory model instead.

Also bump the protocol version to exclusively mark such v9.0
libraries. Check commit 451d1d676237c81 for further details.

BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=97769
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>