Remove backward compatibility flag am: d1bedc4e64 am: 0d8879b0f2 am: 774cf9e68c

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1413548

Change-Id: I669468e3b73930ee97436a6a2e80abc8a4f4befd
tree: f1f747598294232662c15b750033b8515633f271
  1. staticlibs/