feat: Add libaom based GStreamer AV1 decoder

This is useful to GStreamer project in order to ensure nothing in
GStreamer prevents libaom from working correctly. This decoder fully
passes AV1-TEST-VECTORS, CHROMIUM-8bit-AV1-TEST-VECTORS and
CHROMIUM-10bit-AV1-TEST-VECTORS. The Argon suites have been ignored for now.

fluster/decoders/gstreamer.py

@@ -525,6 +525,15 @@ class GStreamerV4l2VP9Gst10Decoder(GStreamer10Video):
     api = "V4L2"
 
 
+@register_decoder
+class GStreamerAomAV1Gst10Decoder(GStreamer10Video):
+    """GStreamer AV1 AOM decoder implementation for GStreamer 1.0"""
+
+    codec = Codec.AV1
+    decoder_bin = " av1dec "
+    api = "libaom"
+
+
 @register_decoder
 class GStreamerVaAV1Gst10Decoder(GStreamer10Video):
     """GStreamer AV1 VA decoder implementation for GStreamer 1.0"""