Plumbing to recognize AV1 content

Recognize AV1 content in various container formats, so we can extract
and pass to the AV1 codec.

Bug: 111936705
Test: playback of AV1 videos
Change-Id: I8a5523741481586b3569006236bd1fc92869ee76
diff --git a/services/mediacodec/registrant/Android.bp b/services/mediacodec/registrant/Android.bp
index 653317b..f119472 100644
--- a/services/mediacodec/registrant/Android.bp
+++ b/services/mediacodec/registrant/Android.bp
@@ -39,6 +39,7 @@
         "libcodec2_soft_opusdec",
         "libcodec2_soft_vp8dec",
         "libcodec2_soft_vp9dec",
+        "libcodec2_soft_av1dec",
         "libcodec2_soft_vp8enc",
         "libcodec2_soft_vp9enc",
         "libcodec2_soft_rawdec",