Re-enable the tests for background restrictions am: 375f6bba81

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2970571

Change-Id: I999be7b8b11e431f3eaaa3bc9ada0b3d3f6ffe5a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>