Add Assistant content URLs

This is surfaced in recents on Pixel devices for example.
Docs: https://developer.android.com/guide/app-actions/assistant-sharing

Co-authored-by: Jays2Kings <Jays2Kings@users.noreply.github.com>

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -3,6 +3,7 @@ package eu.kanade.tachiyomi.ui.reader
 import android.annotation.SuppressLint
 import android.annotation.TargetApi
 import android.app.ProgressDialog
+import android.app.assist.AssistContent
 import android.content.Context
 import android.content.Intent
 import android.content.res.ColorStateList
@@ -29,6 +30,7 @@ import android.widget.FrameLayout
 import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.core.graphics.ColorUtils
+import androidx.core.net.toUri
 import androidx.core.transition.doOnEnd
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
@@ -296,6 +298,13 @@ class ReaderActivity : BaseActivity() {
         }
     }
 
+    override fun onProvideAssistContent(outContent: AssistContent) {
+        super.onProvideAssistContent(outContent)
+        viewModel.getChapterUrl()?.let { url ->
+            outContent.webUri = url.toUri()
+        }
+    }
+
     /**
      * Called when the options menu of the toolbar is being created. It adds our custom menu.
      */