The enqueue options won't be shown in the dialogs if the Player service is not running. When it's running one item (enqueue stream) will be shown and enqueues the item into the Player type which is currently selected.
- each time something starts to play in any player VideoDetailFragment will be started (if not yet started) and mini player will show up. It makes possible to see a playing stream in mini player even if the stream was started without using fragment or after player service was closed somehow
- play/next/queue buttons will be updated in realtime when stream was added/removed from queue instead of waiting for a onPlay/onPause action to happen
- when popup or background players start the stream will start playing only if paused state wasn't requested. Which means, for example, if a user opens popup it will be started when START_PAUSED is false. If, for example, the stream was played in main player and then popup was started the stream will still be playing, but if it was paused it still be paused in popup (or background) in APPEND_ONLY mode (but will be playing on new queue initialization)
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)
