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

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

Change-Id: Ie0845b8c754744b44c201bd3e5c9ede92f4c9f1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>