Add PNP Listing Wiring.

app/src/main/java/org/thoughtcrime/securesms/components/ViewBinderDelegate.kt

@@ -0,0 +1,34 @@
+package org.thoughtcrime.securesms.components
+
+import android.view.View
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.viewbinding.ViewBinding
+import org.whispersystems.signalservice.api.util.Preconditions
+import kotlin.reflect.KProperty
+
+/**
+ * ViewBinderDelegate which enforces the "best practices" for maintaining a reference to a view binding given by
+ * Android official documentation.
+ */
+class ViewBinderDelegate<T : ViewBinding>(private val bindingFactory: (View) -> T) : DefaultLifecycleObserver {
+
+  private var binding: T? = null
+
+  operator fun getValue(thisRef: Fragment, property: KProperty<*>): T {
+    Preconditions.checkState(thisRef.viewLifecycleOwner.lifecycle.currentState.isAtLeast(Lifecycle.State.CREATED))
+
+    if (binding == null) {
+      thisRef.viewLifecycleOwner.lifecycle.addObserver(this@ViewBinderDelegate)
+      binding = bindingFactory(thisRef.requireView())
+    }
+
+    return binding!!
+  }
+
+  override fun onDestroy(owner: LifecycleOwner) {
+    binding = null
+  }
+}