Change `aconfig dump` to `aconfig dump-cache`

Update the calls to dump aconfig caches; the new canonical name is
`dump-cache`, though `dump` is still an accepted alias (for now).

Bug: N/A
Test: m all_aconfig_declarations && printflags
Change-Id: I9f82d31666ced6bbd0f195f1422590547114e0f0