Merge "Add hidden API getDataSaverViaCmFlag() for CTS" into main am: eb33cf470d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2822810

Change-Id: Icb39a3f817fa60dd481c77a99f04301c8ca4b2a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>