Merge "Revert "Suppress NewApi warnings for @SystemApi -> public APIs"" am: 9a3f0adc35 am: e4147865ee am: 71dda95890

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1927300

Change-Id: Ic12a558f597d9bb826d669f091a087b587a5e564