[CTS]It should be more reasonable to control battery saver function from setting DB instead of plugging/unplugging charger for CtsHostsideNetworkTests test case. am: 2ecad8d87d am: ca83ca8472 am: 254dfe5017
am: dc396795cc

Change-Id: I97f5aa84b291e02e98fd6392d10c3879eceff19d