android/ios templates: fix plugins lists
android/ios templates: fix plugins lists

daa9187848c6d0aaba0b40e64e4efba597300db7 introduces static libraries
into the originally non-static library recipes which causes the static
libraries to be mangled incorrectly and added to the plugin lists in the
android and ios templates.

Fix by only selecting libraries with '%(mext)s' as found in all dynamic
libraries. This corrects the list to be similar to what was being
generated pre-daa9187848c6d0aaba0b40e64e4efba597300db7

fluendo/cerbero,centricular/cerbero,atsushieno/cerbero,nirbheek/cerbero,flexVDI/cerbero,GStreamer/cerbero,flexVDI/cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,nirbheek/cerbero,atsushieno/cerbero,nirbheek/cerbero,centricular/cerbero,flexVDI/cerbero,centricular/cerbero,atsushieno/cerbero,fluendo/cerbero,centricular/cerbero,GStreamer/cerbero,flexVDI/cerbero,flexVDI/cerbero,GStreamer/cerbero,fluendo/cerbero,GStreamer/cerbero,GStreamer/cerbero,fluendo/cerbero,atsushieno/cerbero,nirbheek/cerbero