Correctly remove package-info.java from empty packages

#minor-release

PiperOrigin-RevId: 373550935

playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/hls/package-info.java

-/*
- * Copyright (C) 2020 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.
- */
-@NonNullApi
-package com.google.android.exoplayer2.playbacktests.hls;
-
-import com.google.android.exoplayer2.util.NonNullApi;

playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/package-info.java

-/*
- * Copyright (C) 2020 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.
- */
-@NonNullApi
-package com.google.android.exoplayer2.playbacktests;
-
-import com.google.android.exoplayer2.util.NonNullApi;