[ENHANCEMENT] Replace "findViewById" by "@BindView"

[4rthurRousseau]

Is your feature request related to a problem? Please describe.
I noticed that you're using Butterknife but there is still some "findViewById" usage here and there, sometimes on classes that already use ButterKnife.

Example from the "CurrencyListViewActivity" class :

@BindView(R.id.listView)
RecyclerView mListview;

[...]

mListview = findViewById(R.id.listView);

Describe the solution you'd like
Take some time to tidy up those classes.

[hafiz703]

I can have a go at this

[RyanMarzec]

I have updated some files containing to this issue, for now I am only working on files within "app/src/main/java/io/github/project_travel_mate/utilities/"

I just have a questions before proceeding with a PR for this section.

1. Would you prefer BindView variables declared at the top Fragment/Activity class or in a ViewHolder class?
   I noticed in most files in the utilities folder use butterknife in the same format as the example above in the initial post, while for example in DailyQuotesFragment a ViewHolder class is used for the BindView variables.

[Swati4star]

@RyanMarzec
I'll prefer these to be declared in ViewHolder class.

Sure, create a PR and I'll review the changes.