Default color palette

[mrStudent123]

If we don't specify a color array the app crashes (NPE). It would be good practice to use a default material design color palette instead.

[mrStudent123]

I just took the values from here:
https://material.io/guidelines/style/color.html#color-color-palette

<integer-array name="colorpicker_default_colors"> <item>#F44336</item> <item>#E91E63</item> <item>#9C27B0</item> <item>#673AB7</item> <item>#3F51B5</item> <item>#2196F3</item> <item>#03A9F4</item> <item>#00BCD4</item> <item>#009688</item> <item>#4CAF50</item> <item>#8BC34A</item> <item>#CDDC39</item> <item>#FFEB3B</item> <item>#FFC107</item> <item>#FF9800</item> <item>#FF5722</item> <item>#795548</item> <item>#9E9E9E</item> <item>#607D8B</item> <item>#000000</item> <item>#FFFFFF</item> </integer-array>

Also I feel the title and default color should be NPE safe.