Primal does not follow nip 55

[greenart7c3]

Describe the bug

Currently primal is using a constant package id for opening the android signer but the nip states you should check for any installed signer like this:

fun isExternalSignerInstalled(context: Context): Boolean {
  val intent =
    Intent().apply {
      action = Intent.ACTION_VIEW
      data = Uri.parse("nostrsigner:")
    }
  val infos = context.packageManager.queryIntentActivities(intent, 0)
  return infos.size > 0
}

When using the get_public_key you should save the package name returned by the signer in something like the shared prefs and use that package name

val packageName = intent.data?.getStringExtra("package")

Steps to reproduce

You can test this by using nowser or using Amber in debug mode

Expected behavior

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