Disable data saver mode in AbstractRestrictBackgroundNetworkTestCase setup

This test assumes the data saver mode is initially disabled, but WearOS enables the mode on boot. This change fixes the precondition in the setUp method.

Test: run cts -m CtsHostsideNetworkTests
Bug: 315081804
Fixes: 315081804
Change-Id: Ibcceaf0f44821100c861ef7b3c61d0888ae30481
(cherry picked from commit 2cdeffc7e97a915a847cfc40d89e091aeadf20b3)
2 files changed