Camera: Update Low Light Boost Docs

I9809e977f updated the metadata_definitions.xml but the changes were
not reflected in NdkCameraMetadataTags.h.

This patch runs metadata-generate to update the autogenerated
files with the new low light boost documentation.

Bug: 337364266
Test: Manually verified that the documentation looks OK.
Change-Id: I2c8117ebb470445337ef74031c5586be1e086f35