Merge "Don't back off for first few system stops." into udc-dev am: 0f26a22c am: 0d0b0927

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23249503



Change-Id: I2ab5b0f656a183f74d6fa7437c3b8745e5e884b4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>