ultrahdr: Fix nan occurence during xmp generation am: cd3f6373 am: c208f8ee

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



Change-Id: I54d584a2c52c2e6725d5b0173226acc2038ba628
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>