Merge "[NFCT.NS.12] Override toString methods in conntrack related classes" am: 2676dea8c8 am: ae044dbf8b am: b0e6956df7

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1495896

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic7666d722ef810a82cc7503a4ef79a320d635a07