Freeze NetworkStack AIDL interface for v11. am: f5014f43a7 am: fc36f3b083 am: 5e4719aebd am: d56e3e6dc2

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1438152

Change-Id: I6d0c109d9617825de8a070673280c642429a86e0