NewPipe (f-droid version) 0.15.0

ATTENTION: This version is propably a bugfest, just like the last one. However doe to the full shutdown since the 17. a broken version is better then no version. Right? ¯_(ツ)_/¯

Improvements
downloaded files can now be opened with one click #1879
drop support for android 4.1 - 4.3 #1884
remove old player #1884
remove streams from current play queue by swiping them to the right #1915
remove auto queued stream when a new stream is enqueued manually #1878
Postprocessing for downloads and implement missing features #1759 by @kapodamy
Post-processing infrastructure
Proper error handling "infrastructure" (for downloader)
Queue instead of multiple downloads
Move serialized pending downloads (.giga files) to app data
Implement max download retry
Proper multi-thread download pausing
Stop downloads when swicthing to mobile network (never works, see 2nd point)
Save the thread count for next downloads
A lot of incoherences fixed
Fixed
Fix crash with default resolution set to best and limited mobile data resolution #1835
pop-up player crash fixed #1874
NPE when trying to open background player #1901
Fix for inserting new streams when auto queuing is enabled #1878
Fixed the decypering shuttown issue