Merge "Small comment formatting for doxygen in NdkMediaMuxer.h" into sc-dev

/**

 * Creates a new media muxer for appending data to an existing MPEG4 file.

 * This is a synchronous API call and could take a while to return if the existing file is large.

 * Works for only MPEG4 files that contain a) a single audio track, b) a single video track,

 * c) a single audio and a single video track.

 * @param(fd): needs to be opened with read and write permission.  Does not take ownership of

 * Only works for MPEG4 files matching one of the following characteristics:

 * <ul>

 *    <li>a single audio track.</li>

 *    <li>a single video track.</li>

 *    <li>a single audio and a single video track.</li>

 * </ul>

 * @param fd Must be opened with read and write permission. Does not take ownership of

 * this fd i.e., caller is responsible for closing fd.

 * @param(mode): AppendMode is an enum that specifies one of the modes of appending data.

 * @return : Pointer to AMediaMuxer if the file(fd) has tracks already, otherwise, nullptr.

 * @param mode Specifies how data will be appended; the AppendMode enum describes

 *             the possible methods for appending..

 * @return Pointer to AMediaMuxer if the file(fd) has tracks already, otherwise, nullptr.

 * {@link AMediaMuxer_delete} should be used to free the returned pointer.

 *

 * Available since API level 31.