Merge "Revert "Add a flag dot_keep_unusable_xport_sec"" am: b9868dfb am:...

Merge "Revert "Add a flag dot_keep_unusable_xport_sec"" am: b9868dfb am: 0574af5c am: 5cb66f7e am: 388c05bc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2127632



Change-Id: I01cac3771146869a72929293151223a095fb3534
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>