Be sure to get default dpi

Change-Id: Ia9cb33b81827af7e46670f76db7e34aac78602cf
Switch UIMode without reboot

Change-Id: I8fb10f8d81e3400b2050062e07e1b074aea359c6
Get proper values

Change-Id: I406c5ff046bc766ad8145b5cbc4bd9af92c3a681