init: Start rmt_storage in charger mode

This is required to prevent mdm watchdog bites

Change-Id: I0479bf550075d2158cc37f02f897732de693f47e
Make wpa_supplicant oneshot.

Should fix tethering.

framework/base 0685af39ebaa5f1666007f86b5941037363116b6 broke it initially.

Change-Id: Ida0c54459debe412114bc2ce3d45833f7607866b