Disable battery saver test on WearOS

Triggering battery saver mode on WearOS casues
the device to restart if traditional watch mode (TWM)
is enabled, breaking the test suite.

This change disables the test for those devices.

Bug: 173080735
Bug: 204809787
Test: atest CtsStatsdHostTestCases:HostAtomTests
Merged-In: I2df25d54ecd57748af06efaa6ac2533d852861f2
Change-Id: I2df25d54ecd57748af06efaa6ac2533d852861f2
(cherry picked from commit 77077304900f047a3dc262e7097ed6c41d9d3cce)