[droidvenc] don't wait forever for EOS. Fixes JB#31215
[droidvenc] don't wait forever for EOS. Fixes JB#31215

It is rare but it can happen that we wait forever for the encoder to
signal eos. A solution is to give the encoder 2 seconds to respond
otherwise we proceed normally.

mlehtima/gst-droid,mlehtima/gst-droid,sailfishos/gst-droid