docs/android: Fix example meson cross file again
What does this MR do and why?
docs/android: Fix example meson cross file again
I copied it over wrong, it should be cpu_family that's changed to
aarch64 to avoid "error: undefined symbol: blake3_hash_many_neon".
Fixes: 57abef5af1f3 ("docs/android: Fix example meson cross file")