Merge "Update MediaMuxer javadoc to reflect that B-frame muxing is supported...

Merge "Update MediaMuxer javadoc to reflect that B-frame muxing is supported since Android Nougat MR1." into main am: 9e36084a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3300935



Change-Id: I6e82d97dc6abb554272d665406e9d252914f64e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>