UI error crash when rotating screen while "add to playlist" modal is open.

[Magicfulness]

Checklist

• I am using the latest version - 0.21.15
• 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

1. Long hold on any video and press add to playlist. (Alternatively, select the "add to playlist" option under any video when watching).
2. Rotate the screen while "auto-rotate" feature is on.

Actual behavior

App crashes, and we are sent to home page.

Expected behavior

App does not crash. Ideally the "add to playlist" modal is still open, but doesn't matter if it isn't.

Screenshots/Screen recordings

#7825 (comment)

Logs

Exception

• User Action: ui error
• Request: ACRA report
• Content Country: US
• Content Language: en-US
• App Language: en_US
• Service: none
• Version: 0.21.15
• OS: Linux Android 11 - 30

Crash log

java.lang.RuntimeException: Unable to start activity ComponentInfo{org.schabi.newpipe/org.schabi.newpipe.MainActivity}: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment org.schabi.newpipe.local.dialog.PlaylistAppendDialog: could not find Fragment constructor
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3622)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3786)
	at android.app.ActivityThread.handleRelaunchActivityInner(ActivityThread.java:5666)
	at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:5572)
	at android.app.servertransaction.ActivityRelaunchItem.execute(ActivityRelaunchItem.java:69)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2257)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:233)
	at android.app.ActivityThread.main(ActivityThread.java:8030)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:631)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:978)
Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment org.schabi.newpipe.local.dialog.PlaylistAppendDialog: could not find Fragment constructor
	at androidx.fragment.app.Fragment.instantiate(Fragment.java:628)
	at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
	at androidx.fragment.app.FragmentManager$3.instantiate(FragmentManager.java:483)
	at androidx.fragment.app.FragmentStateManager.<init>(FragmentStateManager.java:85)
	at androidx.fragment.app.FragmentManager.restoreSaveState(FragmentManager.java:2728)
	at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController.java:198)
	at androidx.fragment.app.FragmentActivity$2.onContextAvailable(FragmentActivity.java:149)
	at androidx.activity.contextaware.ContextAwareHelper.dispatchOnContextAvailable(ContextAwareHelper.java:99)
	at androidx.activity.ComponentActivity.onCreate(ComponentActivity.java:322)
	at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:273)
	at org.schabi.newpipe.MainActivity.onCreate(MainActivity.java:143)
	at android.app.Activity.performCreate(Activity.java:8006)
	at android.app.Activity.performCreate(Activity.java:7990)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3595)
	... 13 more
Caused by: java.lang.NoSuchMethodException: org.schabi.newpipe.local.dialog.PlaylistAppendDialog.<init> []
	at java.lang.Class.getConstructor0(Class.java:2332)
	at java.lang.Class.getConstructor(Class.java:1728)
	at androidx.fragment.app.Fragment.instantiate(Fragment.java:613)
	... 27 more

---

Device info

• Android version/Custom ROM version: Android 11, official version by OnePlus
• Device model: OnePlus 8T

[Magicfulness]

22-02-05-23-23-25.mp4

[opusforlife2]

Thanks for the great bug report!

[GGAutomaton]

I've found the problem and would like to work on this issue.

[GGAutomaton]

Going to fix it with this method.