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
renamed NewPipe's language into App language, and same for all the
concerning thing (keys, comments…)
we now call assureCorrectAppLanguage(CONTEXT) in activities needing it
instead of changeAppLanguage(getAppLocale(CONTEXT), RESOURCES)
changeAppLanguage becomes private.
This enables modern TLS versions in the collection browser, the Downloader and the Player.
This is neccessary because media.ccc.de rejects all older TLS connection attempts, see issue #2777.
* restore permission request popup previously removed in #2486
* use legacy file picker in cases where saf file picker is not available
* fix missing file check logic in prepareSelectedDownload method (DownloadDialog.java)
