Add powered-by footer to event list, alternative to #63

[dmfs]

@lemonboston please review. We're going to add this to the list for now, but we're certainly going to add some behavior later on.

[lemonboston]

I checked with layout inspector and this margin leaves a little bit too much space covered by the footer, can be changed to 24dp safely (I checked), to avoid incorrect proportions of the bottom items (no more events).

[lemonboston]

I think the duplication should be resolved with the footer in the details view, either with layout of its own and include tag (extra tags can be added to include), or extracted style, but probably include is better, imo.

[dmfs]

@lemonboston please review again. Note that I've rebased and squashed the commits, so you should remove your local branch first.
The problem was that the text size wasn't set to 0 which means the bar was slightly larger than the image+padding. Setting the textSize to 0 and increasing the padding fixed it.

[lemonboston]

Why is SchedJoulesFooterView still a TextView? Couldn't it be simply an ImageView?

I think it would be useful to move the common layout definition of <SchedJoulesFooterView....> to a separate layout file and include it to remove the duplication. And use it like:

<include layout='schedjoules_powered_by_footer'
         app:layout_anchor="@id/schedjoules_footer_placeholder"
        app:layout_anchorGravity="bottom|center_horizontal"/>

So adding the special properties at the place of include.

.

[dmfs]

If we use an ImageView we have to wrap it in a FrameLayout to get the padding and background color right. I agree that a TextView looks strange but it serves the purpose.
Good idea with the include. I'll do that.