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: 280542664
(cherry picked from https://android-review.googlesource.com/q/commit:2cdeffc7e97a915a847cfc40d89e091aeadf20b3)
Merged-In: Ibcceaf0f44821100c861ef7b3c61d0888ae30481
Change-Id: Ibcceaf0f44821100c861ef7b3c61d0888ae30481