Extend PrivateDnsConfigParcel to carry DoH information and private DNS mode am: 5ce8c90f7d am: dfd3071fd9 am: 0ef92b24b1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2453205

Change-Id: Ie8b87b49f34aea90a5c7dedbf13c8cb5bd19e054
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>