ultrahdr: Fix nan occurence during xmp generation am: cd3f637361

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23539346

Change-Id: Ice5430611ff6c6fbe144c22f683d5693348e69bb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>