Light/Dark mode support for Android

[sree-yml]

When your dictionary has root nodes like light and dark. Then it should write token into

value and value-night folder respectively. Also, trim the light and dark from the name itself.

The current behavior is attached below, this won't help in supporting night mode.

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="light_primary">#ff59a4d0</color>
    <color name="light_surface">#ffffffff</color>
    <color name="light_on_surface">#ff000000</color>

    <color name="dark_primary">#ff778994</color>
    <color name="dark_surface">#ff000000</color>
    <color name="dark_on_surface">#ffffffff</color>


</resources>

Expected output

value
- exported_color.xml
value -night
- exported_color.xml

 The content inside the  value folder 

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="primary">#ff59a4d0</color>
    <color name="surface">#ffffffff</color>
    <color name="on_surface">#ff000000</color>
</resources>

The content inside the value-night folder

<?xml version="1.0" encoding="utf-8"?>
<resources>
      <color name="primary">#ff778994</color>
      <color name="surface">#ff000000</color>
     <color name="on_surface">#ffffffff</color>
</resources>