Merge "Revert "Add hidden API getDataSaverViaCmFlag() for CTS"" into main am: 0a4ba7bfca

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2836418

Change-Id: I8e06e7b423f12818e72f5d9d3c625a4348da93f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>