Merge "Add GetResolverStats to cache unit test" into rvc-dev am: f95c3342 am: 0c0b8c17 am: 315d2dd9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/11788845

Change-Id: I56f84480dbbc8cd3c5a4e69dac0521f1ef9c6d0a