Add MediaType for "image/heif" and "image/jp2"

RELNOTES=Add MediaType for "image/heif" and "image/jp2"

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=260960132

Author: kristineguo

android/guava/src/com/google/common/net/MediaType.java

@@ -242,6 +242,20 @@ private static MediaType addKnownType(MediaType mediaType) {
    */
   public static final MediaType WEBP = createConstant(IMAGE_TYPE, "webp");
 
+  /**
+   * <a href="https://www.iana.org/assignments/media-types/image/heif">HEIF image format</a>.
+   *
+   * @since NEXT
+   */
+  public static final MediaType HEIF = createConstant(IMAGE_TYPE, "heif");
+
+  /**
+   * <a href="https://tools.ietf.org/html/rfc3745">JP2K image format</a>.
+   *
+   * @since NEXT
+   */
+  public static final MediaType JP2K = createConstant(IMAGE_TYPE, "jp2");
+
   /* audio types */
   public static final MediaType MP4_AUDIO = createConstant(AUDIO_TYPE, "mp4");
   public static final MediaType MPEG_AUDIO = createConstant(AUDIO_TYPE, "mpeg");

guava/src/com/google/common/net/MediaType.java

@@ -242,6 +242,20 @@ private static MediaType addKnownType(MediaType mediaType) {
    */
   public static final MediaType WEBP = createConstant(IMAGE_TYPE, "webp");
 
+  /**
+   * <a href="https://www.iana.org/assignments/media-types/image/heif">HEIF image format</a>.
+   *
+   * @since NEXT
+   */
+  public static final MediaType HEIF = createConstant(IMAGE_TYPE, "heif");
+
+  /**
+   * <a href="https://tools.ietf.org/html/rfc3745">JP2K image format</a>.
+   *
+   * @since NEXT
+   */
+  public static final MediaType JP2K = createConstant(IMAGE_TYPE, "jp2");
+
   /* audio types */
   public static final MediaType MP4_AUDIO = createConstant(AUDIO_TYPE, "mp4");
   public static final MediaType MPEG_AUDIO = createConstant(AUDIO_TYPE, "mpeg");