Add the missing exif data for Android

Some of the exif data has been previously been lost. Now they are
included as the sub directory is looped and names of exif data are
formated to match with ExifInterface class requirements.

android/src/main/java/com/lwansbrough/RCTCamera/MutableImage.java

@@ -15,6 +15,7 @@ import com.drew.metadata.Metadata;
 import com.drew.metadata.MetadataException;
 import com.drew.metadata.Tag;
 import com.drew.metadata.exif.ExifIFD0Directory;
+import com.drew.metadata.exif.ExifSubIFDDirectory;
 import com.facebook.react.bridge.ReadableMap;
 
 import java.io.BufferedInputStream;
@@ -179,7 +180,6 @@ public class MutableImage {
             ExifInterface exif = new ExifInterface(file.getAbsolutePath());
 
             // copy original exif data to the output exif...
-            // unfortunately, this Android ExifInterface class doesn't understand all the tags so we lose some
             for (Directory directory : originalImageMetaData().getDirectories()) {
                 for (Tag tag : directory.getTags()) {
                     int tagType = tag.getTagType();
@@ -188,6 +188,18 @@ public class MutableImage {
                 }
             }
 
+            // Add missing exif data from a sub directory
+            ExifSubIFDDirectory directory = originalImageMetaData()
+                .getFirstDirectoryOfType(ExifSubIFDDirectory.class);
+            for (Tag tag : directory.getTags()) {
+                int tagType = tag.getTagType();
+                // As some of exif data does not follow naming of the ExifInterface the names need
+                // to be transformed into Upper camel case format.
+                String tagName = tag.getTagName().replaceAll(" ", "");
+                Object object = directory.getObject(tagType);
+                exif.setAttribute(tagName, object.toString());
+            }
+
             writeLocationExifData(options, exif);
 
             if(hasBeenReoriented)