For #16477: Switch to using an extension to update a11y collection info.

app/src/main/java/org/mozilla/fenix/ext/View.kt

@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+@file:Suppress("TooManyFunctions")
+
 package org.mozilla.fenix.ext
 
 import android.graphics.Rect
@@ -95,18 +97,42 @@ fun View.updateAccessibilityCollectionItemInfo(
     }
 }
 
+/**
+ * Updates the a11y collection info for a list.
+ */
+fun View.updateAccessibilityCollectionInfo(
+    rowCount: Int,
+    columnCount: Int
+) {
+    this.accessibilityDelegate = object : View.AccessibilityDelegate() {
+        override fun onInitializeAccessibilityNodeInfo(
+            host: View?,
+            info: AccessibilityNodeInfo?
+        ) {
+            super.onInitializeAccessibilityNodeInfo(host, info)
+            info?.collectionInfo = AccessibilityNodeInfo.CollectionInfo.obtain(
+                rowCount,
+                columnCount,
+                false
+            )
+        }
+    }
+}
+
 /**
  * Fills a [Rect] with data about a view's location in the screen.
  *
  * @see View.getLocationOnScreen
  * @see View.getRectWithViewLocation for a version of this that is relative to a window
-*/
+ */
 fun View.getRectWithScreenLocation(): Rect {
     val locationOnScreen = IntArray(2).apply { getLocationOnScreen(this) }
-    return Rect(locationOnScreen[0],
+    return Rect(
+        locationOnScreen[0],
         locationOnScreen[1],
         locationOnScreen[0] + width,
-        locationOnScreen[1] + height)
+        locationOnScreen[1] + height
+    )
 }
 
 /**

app/src/main/java/org/mozilla/fenix/tabtray/TabTrayView.kt

@@ -9,8 +9,6 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.accessibility.AccessibilityEvent
-import android.view.accessibility.AccessibilityNodeInfo
-import android.view.accessibility.AccessibilityNodeInfo.CollectionInfo
 import androidx.annotation.IdRes
 import androidx.cardview.widget.CardView
 import androidx.constraintlayout.widget.ConstraintLayout
@@ -52,6 +50,7 @@ import org.mozilla.fenix.components.toolbar.TabCounter.Companion.MAX_VISIBLE_TAB
 import org.mozilla.fenix.components.toolbar.TabCounter.Companion.SO_MANY_TABS_OPEN
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.settings
+import org.mozilla.fenix.ext.updateAccessibilityCollectionInfo
 import org.mozilla.fenix.tabtray.SaveToCollectionsButtonAdapter.MultiselectModeChange
 import org.mozilla.fenix.tabtray.TabTrayDialogFragmentState.Mode
 import java.text.NumberFormat
@@ -673,24 +672,11 @@ class TabTrayView(
             String.format(view.context.getString(R.string.open_tab_tray_plural), count.toString())
         }
 
-        view.tabsTray.accessibilityDelegate = object : View.AccessibilityDelegate() {
-            override fun onInitializeAccessibilityNodeInfo(
-                host: View?,
-                info: AccessibilityNodeInfo?
-            ) {
-                super.onInitializeAccessibilityNodeInfo(host, info)
-                val isListTabView = view.context.settings().listTabView
-
-                val columnCount = if (isListTabView) 1 else getNumberOfGridColumns(view.context)
-                val rowCount = count.toDouble().div(columnCount).roundToInt()
+        val isListTabView = view.context.settings().listTabView
+        val columnCount = if (isListTabView) 1 else getNumberOfGridColumns(view.context)
+        val rowCount = count.toDouble().div(columnCount).roundToInt()
 
-                info?.collectionInfo = CollectionInfo.obtain(
-                    rowCount,
-                    columnCount,
-                    false
-                )
-            }
-        }
+        view.tabsTray.updateAccessibilityCollectionInfo(rowCount, columnCount)
     }
 
     private fun updateTabCounter(count: Int): String {