Run validation on user specified vabc_compression_param

During OTA generation, we check the vabc compression param specified by
target files, and override compression param to gz if the specified
compression method is unsupported. Run the same validation on
compression param passed by --vabc_compression_param as well.

Test: th
Change-Id: If855a2ee8c3c280c74efd5a67df229ab6c5709c5