Change method name 'encode' to 'encodeHtml'

[pdhung3012]

This class is used to provide utilities for handling Html. The method named 'encode' is to encode an html page. Thus, the method name 'encodeHtml' is more intuitive than 'encode'.

[maniac103]

That method doesn't encode (to) HTML, as the new name would imply, though. It encodes HTML source into a Spannable.

[Fs00]

encodeToSpanned/encodeToSpannable would probably be a better name... The fact that the method belongs to the HtmlUtils class already implies that you're working with HTML.