Add up next icon to episode chip

[mchowning]

Description

This adds an up-next icon to the EpisodeChip.

In addition, this updates the episode chip to vertically center the podcast image when there are no icons present. Unfortunately, you can't test this currently because the only screens using this chip right now are the Up Next screen and the Downloads screen and I certainly hope that any podcast on one of those screens should either be in the Up Next or downloaded. 😄 I've included a screenshot below though so you can see what it would look like.

Note
This PR builds on #909.

Testing Instructions

1. Go to the Up Next queue or the Downloads page
2. Observe that the up-next icon and download icons are presented when appropriate

Screenshots or Screencast

Both icons	Up Next only	Downloaded only	No icons

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• I have considered whether it makes sense to add tests for my changes
• All strings that need to be localized are in modules/services/localization/src/main/res/values/strings.xml
• Any jetpack compose components I added or changed are covered by compose previews

[ashiagr]

Looks good, just that up-next icon appears a little bit higher

App

Figma

[mchowning]

up-next icon appears a little bit higher

Thanks for calling that out. I'm not sure why the up next icon in the project isn't centered vertically, so I updated it from FIgma. The new icon uses a slightly thicker strokes and generally has a slightly different style, so I also updated the download icon so they both have the same style (a894914). This change also updates the icons in the phone app.

Before	Now