ofono: upgrade 2.18 -> 2.19

ofono: upgrade 2.18 -> 2.19

Upstream changes:

- gobi: Support raw-ip only devices
- Revert "atmodem: let +COPS: report access technology for SIMCom"
- atmodem: report cell technology capability for SIMCom A76XX
- atmodem: also handle EUTRAN networks in creg_notify()
- atmodem: add explicit handling for netreg status in creg_notify()
- sim7100: Update to handle broader A76XX modem series
- sim7100: enable ppp-reset workaround
- plugins: drop droid and use gobi for droid4 modem instead
- gobi: Add "OfflineOperatingMode" property
- gobi: do not assume LTE is supported, detect it
- ofono.conf: enable D-Bus use with PipeWire
- gobi: If WDA unsupported, skip data format logic
- gobi: request PDS service if supported
- gobi: fix start_service_requests() return type

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>