Merge "Add more context in javadoc of setDataSaverEnabled" into main am: 9c8111dd3a am: 60d1625056 am: 62f352209d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2900568

Change-Id: Ib264815ca81107b893af9e1f34fa8ca39dbe9bb5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>