With the introduction of the javacv library when re-adding the QR code
scanner feature for mobile notification pairing in #7050, the Bisq
binary increased to nearly 1 GB from its previous size of around 300 MB.
When including the javacv-platform dependency, it pulls in binaries
for all platforms. But it is possible to limit this by utilizing
the gradle-javacpp platform plugin which by default will pull in
binaries only for the current platform.
Reference: https://github.com/bytedeco/gradle-javacpp#the-platform-plugin
With this change, the included libs went from ~980 MB down to ~366 MB.
This restores the functionality that was removed in b5beea58. However,
this implementation utilizes the JavaCV library rather than the
webcam-capture library as discussed in #4940. As a result, this should
now provide macOS support.
