Add missing license header to PipelineDumper.kt in main

Bug: 243819288
Test: n/a, just adds a comment
Change-Id: I3f283967994c87c1b2a341b5ff41387b7bf4177a

packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/PipelineDumper.kt

@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package com.android.systemui.statusbar.notification.collection
 
 import com.android.systemui.statusbar.notification.collection.listbuilder.pluggable.Pluggable