For the camera and sensor Fixes a couple of ClassNotFound java exceptions when initializing GStreamer off the main thread.
Initialization failure is handled correctly by just not registering the ahssrc element. https://bugzilla.gnome.org/show_bug.cgi?id=774048
ahssrc is a new plugin that enables Gstreamer to read from the android.hardware.Sensor Android sensors. These sensors are treated as buffers and can be passed through and manipulated by the pipeline. https://bugzilla.gnome.org/show_bug.cgi?id=768110