Remote Image Processing (#1684)

* Update ServerConfig.kt

* Update ConversionUtil.kt

* Update Page.kt

* Update ServerConfig.kt

fixed deletions caused by ide

* Update ServerConfig.kt

* Update ServerConfig.kt

* Cleanup

* Post-processing terminology

* More comments

* Lint

* Add known image mimes

* Fix weird mime set/get

* Implement different downloadConversions and serveConversions

* Lint

* Improve Post-Processing massivly

* Fix thumbnail build

* Use Array for headers

* Actually fix headers

* Actually fix headers 2

* Manually parse DownloadConversion

* Cleanup parse

* Fix write

* Update TypeName

* Optimize imports

* Remove header type

* Fix build

---------

Co-authored-by: Syer10 <syer10@users.noreply.github.com>

AndroidCompat/src/main/java/libcore/net/MimeUtils.java

@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 package libcore.net;
+import android.annotation.Nullable;
+
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
@@ -249,10 +251,12 @@ public final class MimeUtils {
         add("audio/x-scpls", "pls");
         add("audio/x-sd2", "sd2");
         add("audio/x-wav", "wav");
+        add("image/avif", "avif");
         // image/bmp isn't IANA, so image/x-ms-bmp should come first.
         add("image/x-ms-bmp", "bmp");
         add("image/bmp", "bmp");
         add("image/gif", "gif");
+        add("image/heif", "heif");
         // image/ico isn't IANA, so image/x-icon should come first.
         add("image/x-icon", "ico");
         add("image/ico", "cur");
@@ -262,6 +266,7 @@ public final class MimeUtils {
         add("image/jpeg", "jpg");
         add("image/jpeg", "jpeg");
         add("image/jpeg", "jpe");
+        add("image/jxl", "jxl");
         add("image/pcx", "pcx");
         add("image/png", "png");
         add("image/svg+xml", "svg");
@@ -438,6 +443,7 @@ public final class MimeUtils {
      * @return The extension has been registered for
      * the given case insensitive MIME type or null if there is none.
      */
+    @Nullable
     public static String guessExtensionFromMimeType(String mimeType) {
         if (mimeType == null || mimeType.isEmpty()) {
             return null;