APKs are already aligned during the build step.

We had some conditional check to use Android tools version 12 when
signing Tor Browser 14.5.x.
Now that it's EOL, we do not need it anymore.

Apps are required to support 16KiB page size.
We already build our binaries so that they comply with this
requirement, but we also need to pass the specific argument to zipalign
before signing, for it to actually work.