Nowhere else does this (write a setting if it’s not set).
It took me a while to see that this code does not do what it intends,
because `defaultFormat` is already the default value in the first
`context.getString`, so calling `getMediaFormatFromKey` again is the
exact same call (“do you know the definition of insanity…”) and will
return `null` again …
So let’s drop the setting write and just rely on the default values.
This format is not supported by ExoPlayer when returned as HLS streams, so we
can't play streams using this format and this delivery method.
Also improve the Javadoc of ListHelper.getPlayableStreams.
Instead of searching for the first audio stream matching a compatible media
format, this change makes SecondaryStreamHelper.getAudioStreamFor use methods
isLimitingDataUsage, getAudioFormatComparator and getAudioIndexByHighestRank of
ListHelper to get an audio stream which can be muxed into a video-only stream,
if available.
This allows users to download videos with the highest audio quality available
if no resolution limit on mobile data usage has been set.
The order of formats used to search a compatible audio stream has been kept.
imageListToDbUrl should be used if the URL is going to be saved to the database, to avoid saving nothing in case at the moment of saving the user preference is to not show images.
Add the separate utility class PlayButtonHelper to handle the initialization of the listeners.
The ClickListeners on playlist controls had different behaviours. This commit fixes that.
The commit also refactors the way how the app determines whether it is started for the first time. The previous version was not clean and recent in this PR caused it to fail.
The previous "main" tab is now just a normal tab returned in getTabs().
Various part of the code that used to handle channels as ListInfo now either take the first (playable, i.e. with streams) tab (e.g. the ChannelTabPlayQueue), or take all of them combined (e.g. the feed).
