In general, I don't think this is going to collect any more identifiable data than just logging the phone model and Android build ID would; under almost all circumstances every build should correspond to exactly one set of system libraries, and they could match across upgrades just as easily with just the build metadata. Generally, every phone of the same model sold by the same carrier in the same country will have the exact same Android build with the exact same system libraries.

The main benefit that Facebook likely get out of this is that it helps them debug crashes on devices they don't have themselves.