Merge "Making NetworkCapabilities @NonNull" am: d704f87de6 am: c23d46ed6f am: 8f8d1b52d1

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1941593

Change-Id: I8c31ba33ed59eef2034e9ae52f46d1f0e861a521
tree: fb0347d37ad58d1d907b7372a729009c5df97799
  1. core/
  2. framework/
  3. framework-t/
  4. service-t/
  5. services/
  6. tests/