"Play all" button in lists misbehaves when something is already playing

[Stypox]

Checklist

• I am using the latest version - 0.20.2 and (in the future) 0.20.3
• I checked, but didn't find any duplicates (open OR closed) of this issue in the repo.
• I have read the contribution guidelines given at https://github.com/TeamNewPipe/NewPipe/blob/HEAD/.github/CONTRIBUTING.md.
• This issue contains only one bug. I will open one issue for every bug report I want to file.

Steps to reproduce the bug

• enqueue a random video in the background
• open a local playlist, a remote playlist, a channel or the history fragment
• tap on "Play all"

Actual behaviour

The video details of the first item of the list are shown without starting the main player and the rest of the queue is not preserved

Expected behavior

The main player should start playing right away and the already-playing queue should be completely replaced by the whole list (see #4562)

[LargePrime]

Yep, crash

Exception

• User Action: ui error
• Request: App crash, UI failure
• Content Country: CA
• Content Language: en-CA
• App Language: en_CA
• Service: none
• Version: 0.20.2
• OS: Linux Android 9 - 28

Crash log

java.lang.RuntimeException: Unable to start service org.schabi.newpipe.player.MainPlayer@720b36b with Intent { cmp=org.schabi.newpipe/.player.MainPlayer (has extras) }: java.lang.NullPointerException: Attempt to invoke virtual method 'int org.schabi.newpipe.player.playqueue.PlayQueueItem.getServiceId()' on a null object reference
	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3821)
	at android.app.ActivityThread.access$1800(ActivityThread.java:207)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1779)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:193)
	at android.app.ActivityThread.main(ActivityThread.java:6863)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:537)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int org.schabi.newpipe.player.playqueue.PlayQueueItem.getServiceId()' on a null object reference
	at org.schabi.newpipe.fragments.detail.VideoDetailFragment.onQueueUpdate(VideoDetailFragment.java:1736)
	at org.schabi.newpipe.player.helper.PlayerHolder$2.onQueueUpdate(PlayerHolder.java:181)
	at org.schabi.newpipe.player.VideoPlayerImpl.updateQueue(VideoPlayerImpl.java:1982)
	at org.schabi.newpipe.player.VideoPlayerImpl.initPlayback(VideoPlayerImpl.java:714)
	at org.schabi.newpipe.player.BasePlayer.handleIntent(BasePlayer.java:376)
	at org.schabi.newpipe.player.VideoPlayer.handleIntent(VideoPlayer.java:273)
	at org.schabi.newpipe.player.VideoPlayerImpl.handleIntent(VideoPlayerImpl.java:235)
	at org.schabi.newpipe.player.MainPlayer.onStartCommand(MainPlayer.java:127)
	at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3802)
	... 8 more

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[litetex]

Works as expected on 0.22.0