Merge "Remove sleep in test app." into udc-dev am: 70411eee

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/22998119



Change-Id: I576e14a89c4161d001681c6e0ffcdbd4d0757041
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>