[Donate] add simple donate button

[mrvivacious]

As a developer who makes no money on PorNo! atm I want to make money thru PorNo! so that I can get closer to doing full-time on this project, support it and people who help out with PorNo!, and feel closer to financial comfort

Work desc

• [ ] [ChrEx] add a link to my paypal acc. or a 'donation' page on my website? link to patreon and paypal n stuff?? buymecoffee???
• [ ] [Android] add menu item to whatever i end up using for above work item.

<item
        android:id="@+id/donate"
        android:title="@string/action_donate" 
        android:onClick="openUrlForDonations" />

// @string/action_donate = "Donate"
 public void openUrlForDonations(MenuItem item) {
        openUrlInBrowser(LINK_TO_DONATE);
    }

[mrvivacious]

Donate link via paypal added to ChrEx