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

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

Change-Id: I164a2aba7be2c41715f97916d8e83dc84e897e54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>