feat: (YouTube / YouTube Music): Show a tost if original app not instaled

[MarcaDian]

Feature description

Hello, In response to this PR #2907

After migrating to the new ReVanced GmsCore vendor, many users encountered an application crash after installing ReVanced YouTube / ReVanced YouTube Music
I propose to check for installed versions of the original YouTube and YouTube Music applications, and if they are not installed, then show a toast asking you to install it.

Here's an explanation why this happens #2907 (comment)

Motivation

This will prevent users from misunderstanding why ReVanced Youtube or/and ReVanced Youtube Music crashes without any notification.

Acknowledgements

• This issue is not a duplicate of an existing feature request.
• I have chosen an appropriate title.
• All requested information has been provided properly.

[oSumAtrIX]

I think that's already implemented

[LisoUseInAIKyrios]

Is this implemented? If YT is completely uninstalled using ADB (or somehow the phone does not include YT pre installed), then the app still crashes without an explanation.

As far as I know, an app can only check for the existence of other apps if a manifest permission is added (not ideal), or the other app must be launched thru an intent (definitely not ideal).

Maybe an additional patch hook could be added where the YT exception is generated, and show a toast informing the user to install unpatched YT.

[oSumAtrIX]

Unless I completely forgot pushing the changes, I have added the same hook that is present on YouTube to YouTube Music as well.

[oSumAtrIX]

Yes, seems to be present: https://github.com/ReVanced/revanced-patches/blob/dev/src/main/kotlin/app/revanced/patches/shared/misc/gms/BaseGmsCoreSupportPatch.kt

The integrations should probably move to "shared", seems I forgot to do that, but in theory the same behaviour as seen on YouTube should occur in YouTube Music. If not, a bug report should be opened.