Merge "MediaFormat: Explain that KEY_COLOR_FORMAT is used with decoders as well"

 * <tr><th>Name</th><th>Value Type</th><th>Description</th></tr>

 * <tr><td>{@link #KEY_WIDTH}</td><td>Integer</td><td></td></tr>

 * <tr><td>{@link #KEY_HEIGHT}</td><td>Integer</td><td></td></tr>

 * <tr><td>{@link #KEY_COLOR_FORMAT}</td><td>Integer</td><td><b>encoder-only</b></td></tr>

 * <tr><td>{@link #KEY_COLOR_FORMAT}</td><td>Integer</td><td>set by the user

 *         for encoders, readable in the output format of decoders</b></td></tr>

 * <tr><td>{@link #KEY_FRAME_RATE}</td><td>Integer or Float</td><td><b>encoder-only</b></td></tr>

 * <tr><td>{@link #KEY_I_FRAME_INTERVAL}</td><td>Integer</td><td><b>encoder-only</b></td></tr>

 * </table>