Disable the IPv6 provisioning delay to speed up the integration test. am: 7118826f48

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2548134

Change-Id: I2c4dbc59f5b6243015a2b73e55839601abc1fc6b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>