Alexandre Janniaux authored Jan 27, 2023 and Thomas Guillem committed Mar 15, 2023

DynamicsProcessing is used by android/device.c, by audiotrack and by
aaudio and a common vtable is needed as well as the matching JNI helpers
to use the vtable.

The vtable is currently stored in the audiotrack vtable, which is
available in the other plugins in static build. But it leads to
undefined reference errors when compiling a dynamic build of libvlc for
android.

Split the code handling this vtable in a separate convenience library to
address this, which is then linked to every other targets.

Since convenience libraries are playing a different role than static
libraries, and are not linked but merged into the final objects that
will be part of the library output (shared or archive), the symbols are
then available to each of the plugins.

Fixes #27726