Use NetCipher for handling TLS compatibility

[mqus]

What is it?

• Bugfix (user facing)
• Feature (user facing)
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

This (somewhat) fixes #2898 by using netcipher(https://guardianproject.info/code/netcipher/) for handling TLS connections. It has the nice benefit that we can remove a lot of code on our side for handling Android Kitkat.

A small downside is that Netcipher keeps TLS1.1 and 1.0 enabled for Android 19-23 at the moment while 1.0 was disabled for kitkat before, but I don't think this is a showstopper.

You may ask why I did not use the okhttp integration of netcipher: Would be far more complex to implement (we need a Context and an Intent which is only used for Tor integration inside netcipher)

APK testing

app-debug.zip

These changes should be tested on all possible devices and versions as it impacts the whole connectivity on all platforms.
How to test? Check if the following things still work:

• Browsing/searching youtube, media.ccc.de, framatube, soundcloud (there should be no connection error)
• Viewing/hearing media from youtube, media.ccc.de, framatube, soundcloud (should load and display as before)
• Downloading media/subtitles (as applicable) from all providers. (should download as before)

Due diligence

• I read the contribution guidelines.

[Redirion]

NewPipe doesn't start on my device (Pixel 4a, Android 11).
From the name of the exception I would guess that NetCipher doesn't work on Android10+

09-27 14:14:20.516  1704  1879 I ActivityManager: Start proc 23355:org.schabi.newpipe.debug.netcipher2ndtry:acra/u0a395 for service {org.schabi.newpipe.debug.netcipher2ndtry/org.acra.sender.JobSenderService}
09-27 14:14:21.498 23355 23355 E AndroidRuntime: FATAL EXCEPTION: main
09-27 14:14:21.498 23355 23355 E AndroidRuntime: Process: org.schabi.newpipe.debug.netcipher2ndtry:acra, PID: 23355
09-27 14:14:21.498 23355 23355 E AndroidRuntime: java.lang.RuntimeException: Unable to create application org.schabi.newpipe.DebugApp: java.lang.IllegalStateException: Unable to extract the trust manager on Android10Platform, sslSocketFactory is class info.guardianproject.netcipher.client.TlsOnlySocketFactory
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6724)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.ActivityThread.access$1300(ActivityThread.java:237)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1913)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:106)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:223)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:7664)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: Caused by: java.lang.IllegalStateException: Unable to extract the trust manager on Android10Platform, sslSocketFactory is class info.guardianproject.netcipher.client.TlsOnlySocketFactory
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at okhttp3.internal.platform.Platform.buildCertificateChainCleaner(Platform.java:182)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at okhttp3.OkHttpClient$Builder.sslSocketFactory(OkHttpClient.java:768)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at org.schabi.newpipe.DownloaderImpl.<init>(DownloaderImpl.java:43)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at org.schabi.newpipe.DownloaderImpl.init(DownloaderImpl.java:59)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at org.schabi.newpipe.DebugApp.getDownloader(DebugApp.kt:30)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at org.schabi.newpipe.App.onCreate(App.java:100)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at org.schabi.newpipe.DebugApp.onCreate(DebugApp.kt:13)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1192)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6719)
09-27 14:14:21.498 23355 23355 E AndroidRuntime: 	... 8 more

[mqus]

I actually get the same error on Kitkat, so I still have work to do :D. I just did not came around to logcat the error until now.

[litetex]

Added the "wait-for-author" label since there is no progress since >=3 weeks.
And there are conflicts...

[litetex]

Superseded by #7372