Enable fingerprint in care_map

Enable the encoding and parsing of the property_id & partition
fingerprint by default; and add a flag "--no_fingerprint" to disable
the fingerprint generation/parsing to convert the legacy care_map.txt

Bug: 114778109
Test: run unittests in add_img_to_target_files
Change-Id: Id4216d5954e78c3a2d8e8bf19342109daf66a528