intent-filter> <data> tags should only declare a single unique attribute (i.e. scheme OR host, but not both). This better matches the runtime behavior of intent filters, as they combine all of the declared data attributes into a single matcher which is allowed to handle any combination across attribute types.

For example, the following two <intent-filter> declarations are the same:
<intent-filter>
    <data android:scheme="http" android:host="example.com" />
    <data android:scheme="https" android:host="example.org" />
</intent-filter>
<intent-filter>
    <data android:scheme="http"/>
    <data android:scheme="https"/>
    <data android:host="example.com" />
    <data android:host="example.org" />
</intent-filter>

They both handle all of the following:
* http://example.com
* https://example.com
* http://example.org
* https://example.org