Implement new PIN UX.

app/src/main/java/org/thoughtcrime/securesms/animation/AnimationRepeatListener.java

@@ -0,0 +1,32 @@
+package org.thoughtcrime.securesms.animation;
+
+import android.animation.Animator;
+
+import androidx.annotation.NonNull;
+import androidx.core.util.Consumer;
+
+public final class AnimationRepeatListener implements Animator.AnimatorListener {
+
+  private final Consumer<Animator> animationConsumer;
+
+  public AnimationRepeatListener(@NonNull Consumer<Animator> animationConsumer) {
+    this.animationConsumer = animationConsumer;
+  }
+
+  @Override
+  public final void onAnimationStart(Animator animation) {
+  }
+
+  @Override
+  public final void onAnimationEnd(Animator animation) {
+  }
+
+  @Override
+  public final void onAnimationCancel(Animator animation) {
+  }
+
+  @Override
+  public final void onAnimationRepeat(Animator animation) {
+    this.animationConsumer.accept(animation);
+  }
+}