Merge "ppp: switch OWNERS to core networking" am: ed6a8619d9 am: 0985f7946e am: 4a81e7fe2c

Original change: https://android-review.googlesource.com/c/platform/external/ppp/+/1977606

Change-Id: I467bd3ae15050be762c8768828ca3b0b0c1d5e85