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)
-Added LeakCanary as part of debug build.
-Modified bookmark list to show both remote and local playlists.
-Removed ability to save channel items as local playlist, in favor of subscribe.
-Enabled reordering, renaming, removing of items on playlist fragment.
-Enabled removal of dangling streams entries when history is cleared.
-Changed playlist append menu item to icon on service player activity.
-Added adapter and builder for local items, removed dependency on infoitem and existing infolist for database entry items.
-Removed watch history entity and DAO.
-Extracted info item selected listener to remove adding boilerplate code when long click functionality is optional.
-Fixed query returning no record on left join when right table is empty.
-Added UI to create playlist from service player activity.
-Added state saving to playlist dialogs.
-Removed access to history activity on service player activity.
-Made StreamEntity serializable.
-[#919] Fixed custom notification does not trigger unlocking on lockscreen.
-[#947] Fixes player crashing on internet outage, issue partially addressed.
-Fixed main player losing state after destroy while in background.
-Fixed main player controls not hiding automatically after orientation change.
-Fixed dialog uploader not marqueeing when too long.
-Fixed popup permission throwing NPE on BaseList.
-Refactored popup permissions to start in NavigationHelper.
-Extracted hardcoded string for player menus.
-Bump Java version to 1.8.
-Some lambda conversions.
-Added icons for shuffle and drag handle.
-Fixed exception when returning to background player activity after service shuts down.
-Fixed open detail only working for Youtube.
