fix: pass keystore inputs in re-sign step

[LukasMod]

Keystore credentials weren't available since the gradle.properties setup is skipped in the re-sign flow. This caused builds using the re-sign flag to fall back to the default debug keystore.

[thymikee]

Why not enable gradle properties setup in re-sign flow though?

[LukasMod]

Re-sign is done by apksigner and passed arguments

async function signArchive({
  binaryPath,
  keystorePath,
  keystorePassword,
  keyAlias,
  keyPassword,
}: SignOptions) {
...
  const apksignerArgs = [
    'sign',
    '--ks',
    keystorePath,
    '--ks-pass',
    formatPassword(keystorePassword),
    ...(keyAlias ? ['--ks-key-alias', keyAlias] : []),
    ...(keyPassword ? ['--key-pass', formatPassword(keyPassword)] : []),
    ...(isAab(binaryPath) ? ['--min-sdk-version', '36'] : []),
    binaryPath,
  ];

  try {
    await spawn(apksignerPath, apksignerArgs);

which gets data from signArchive options or fallback to default

  const keystorePath = options.keystorePath ?? 'android/app/debug.keystore';
  await signArchive({
    binaryPath: outputPath,
    keystorePath,
    keystorePassword: options.keystorePassword ?? 'pass:android',
    keyAlias: options.keyAlias,
    keyPassword: options.keyPassword,
  });

Not sure if this will read from properties without additional changes, looks like it doesn't touch gradle.