pulseaudio: fix webrtc audio depdency

pulseaudio: fix webrtc audio depdency

Since pulseaudio v16.99.1, the library needed is webrtc-audio-processing-1.
This fixes

Run-time dependency webrtc-audio-processing-1 found: NO (tried pkgconfig and cmake)
Looking for a fallback subproject for the dependency webrtc-audio-processing-1

../pulseaudio-17.0/meson.build:730:15: ERROR: Automatic wrap-based subproject downloading is disabled

The library is available in meta-openembedded/meta-multimedia.

Signed-off-by: Esben Haabendal <esben@geanix.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>