Merge "Add dhcp leasesSubnetPrefixLength and freeze the networkstack aidl v15" am: e64134d173 am: 48ea43dd2f am: e9736f0ccb

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2002151

Change-Id: I185d5afb8635b4b529f17f22b02b7af1740b1cce
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>