DO NOT MERGE) ExifInterface: Provide backward compatibility

ExifInterface.saveAttribute() didn't throw UnsupportedOperationException
before. Use IOException instead of UnsupportedOperationException for
backward compatibility.

Bug: 30936376, Bug: 32068647, Bug: 31319086
Change-Id: Iacc7b4d91d49edd7bece8f2e738a633a91025eca

media/java/android/media/ExifInterface.java

@@ -1372,8 +1372,7 @@ public class ExifInterface {
      */
     public void saveAttributes() throws IOException {
         if (!mIsSupportedFile) {
-            throw new UnsupportedOperationException(
-                    "ExifInterface only supports saving attributes on JPEG formats.");
+            throw new IOException("ExifInterface only supports saving attributes on JPEG formats.");
         }
         // Keep the thumbnail in memory
         mThumbnailBytes = getThumbnail();