add more APIs needed for NewPipe

src/api-impl/android/animation/AnimatorSet.java

@@ -2,4 +2,19 @@ package android.animation;
 
 public class AnimatorSet extends Animator {
 
+	public class Builder {
+
+		public Builder with(Animator animator) {
+			return this;
+		}
+	}
+
+	public Builder play(Animator animator) {
+		return new Builder();
+	}
+
+	public void setInterpolator(TimeInterpolator value) {}
+
+	public void playSequentially(Animator[] animators) {}
+
 }