Allow background networking for test uids am: b7574d4e63

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2966043

Change-Id: I2d14840c95228172990ad151a189b82c5115b842
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>