Doing this programmatically is just a no-go when themes are being set
in some other places (the toolbar is using a custom theme, in this
case), so, instead of hunting down the proper theme, just let the
system do its work.
- on Android TV you'll be able to navigate with D-pad in main fragment and in the player. But not between them for now
- play/pause/next/previous buttons are smaller now
- replaced ic_list with previous version of it
- activity_main looks better which helps with Android TV support
For all manually-created images PNG have been kept.
- rename all icon attrs to have a `ic_` prefix
- always use `_24dp` icons, because there is no real difference, since they are vector drawables
- always use the original name found on material.io for icon drawables, as to not create confusion and possibly duplicates. Icon names can still be different from real drawable names, though I have made some of them compliant to this or maybe more meaningul.
- remove duplicate `getIconByAttr()` in ThemeHelper (use `resolveResourceIdFromAttr()`
- use standard icons for `expand_more` and `expand_less` instead of triangles
- use `play_button_outline` instead of custom PNG as play button in VideoDetailFragment (questionable, as there is no shadow anymore)
- Use a proper drop up/down arrow icon.
- Move selected service views for better visibility.
- Show the selected service icon next to its name.
- Add a subtle fade background to the service name/icon for better
readability.
- Introduce Groupie for easier lists implementations
- Use some of the new components of the Android Architecture libraries
- Add a bunch of icons for groups, using vectors, which still is
compatible with older APIs through the compatibility layer
