Restrict email with attachment to just mail apps on android

[devxpy]

Fixes #49

[taljacobson]

sorry for the late response.
tried your branch out with the example app and was not able to launch any email client's with attachments with your changes.

[devxpy]

Thanks for the response. Will try out the example app to figure out what's going wrong there. (Had been testing on my app directly.)

[VladShturma]

@taljacobson example app starts working if you add the needed code to your AndroidManifest.xml

<application .... />
// add queries tag for mailto intent out side of application tag
<queries>
  <intent>
    <action android:name="android.intent.action.SENDTO" />
    <data android:scheme="mailto" />
  </intent>
</queries>

I believe you should update package's setup instruction and add this code there.

Because there was an issue, that you advised to fix the same way.
#38 (comment)