[fenix] Closes https://github.com/mozilla-mobile/fenix/issues/5465: Added OnCheckListener to all checkboxes ,when there are no items checked delete button will be disabled (https://github.com/mozilla-mobile/fenix/pull/6098)

app/src/main/java/org/mozilla/fenix/settings/deletebrowsingdata/DeleteBrowsingDataFragment.kt

@@ -51,6 +51,10 @@ class DeleteBrowsingDataFragment : Fragment(R.layout.fragment_delete_browsing_da
             })
         }
 
+        getCheckboxes().forEach {
+            it.onCheckListener = { _ -> updateDeleteButton() }
+        }
+
         getCheckboxes().forEach { it.isChecked = true }
 
         view.delete_data?.setOnClickListener {
@@ -58,6 +62,13 @@ class DeleteBrowsingDataFragment : Fragment(R.layout.fragment_delete_browsing_da
         }
     }
 
+    private fun updateDeleteButton() {
+        val enabled = getCheckboxes().any { it.isChecked }
+
+        view?.delete_data?.isEnabled = enabled
+        view?.delete_data?.alpha = if (enabled) ENABLED_ALPHA else DISABLED_ALPHA
+    }
+
     override fun onResume() {
         super.onResume()
         (activity as AppCompatActivity).apply {