Hi,
Thank you for your note. We understand you are concerned about your app being available for tablet devices. We are aware of this issue and are working toward implementing a secure and efficient solution. As a temporary workaround, we recommend targeting the xlarge screen size in your manifest. We thank you for your patience and apologize for any inconvenience this may cause.
For more information on supporting multiple screen sizes, please see the following help center article:
Supporting Multiple Screens | Android Developers.
If your app still does not appear on tablets after targeting the x-large screen size, please let us know and we will investigate further.
If we can assist you further, please let us know.
Regards,
The Google Play Team