ultrahdr: Fix nan occurence during xmp generation am: cd3f6373 am: 223de5d0

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



Change-Id: I8695fc7f4d26c061de66710cecd7e2756fee51a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>