New data stack wait for data disconnected on all subs for APM on am: ef824018 am: cfb20f58

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/18759340



Change-Id: Ia1927ee97d11e4e40ba0aa0b8d14a54ec654f73e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>