Merge "Dump BPF map in base64 encoded strings for testing" am: 61ef984d52 am: 75bba5eace am: 9763c7e778

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1867747

Change-Id: I139f405f582793887169d4f0df4c7e0d41779f2e