store owner of media file and whether it is marked favorite

storage/lib/src/main/java/org/calyxos/backup/storage/content/ContentFile.kt

@@ -100,6 +100,7 @@ internal data class MediaFile(
             .setName(fileName)
             .setSize(size)
             .addAllChunkIds(chunkIds)
+            .setIsFavorite(isFavorite)
             .setVolume(if (volume == MediaStore.VOLUME_EXTERNAL_PRIMARY) "" else volume)
         if (lastModified != null) {
             builder.lastModified = lastModified
@@ -107,6 +108,9 @@ internal data class MediaFile(
         if (zipIndex != null) {
             builder.zipIndex = zipIndex
         }
+        if (ownerPackageName != null) {
+            builder.setOwnerPackageName(ownerPackageName)
+        }
         return builder.build()
     }
 }