AV1 Encoder: Add AV1 to supported types of MediaRecorder

Adds AV1 to supported types of MediaRecorder and fixes MP4 writer

Bug: b/285972478
Test: atest MediaRecorderTest#testAV1SDRecording
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:03dd7d46d318ae05a1466ceb87b01a34e057337e)
Merged-In: I8292665f21f3f836a0f67891322cfee41d78f327
Change-Id: I8292665f21f3f836a0f67891322cfee41d78f327
diff --git a/media/libmediaplayerservice/StagefrightRecorder.cpp b/media/libmediaplayerservice/StagefrightRecorder.cpp
index ec79b99..0365085 100644
--- a/media/libmediaplayerservice/StagefrightRecorder.cpp
+++ b/media/libmediaplayerservice/StagefrightRecorder.cpp
@@ -1986,6 +1986,10 @@
             format->setString("mime", MEDIA_MIMETYPE_VIDEO_DOLBY_VISION);
             break;
 
+        case VIDEO_ENCODER_AV1:
+            format->setString("mime", MEDIA_MIMETYPE_VIDEO_AV1);
+            break;
+
         default:
             CHECK(!"Should not be here, unsupported video encoding.");
             break;
diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index c93d033..b84dc27 100644
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -3581,7 +3581,7 @@
                             (const uint8_t *)buffer->data()
                                 + buffer->range_offset(),
                             buffer->range_length());
-                } else if (mIsMPEG4) {
+                } else if (mIsMPEG4 || mIsAv1) {
                     err = copyCodecSpecificData((const uint8_t *)buffer->data() + buffer->range_offset(),
                             buffer->range_length());
                 }