find5: init: Bring back power management configs

Change-Id: I392ff5eabdb924433c0f6091836fe65d274f7ea1
find5: storage: Clean up mounts and storage list

We have an internal VFAT sdcard partition, and no external SD card.

Remove all of the emulated storage stuff.

Temporarily add ro.adb.secure=0 to DEFAULT_PROPERTY_OVERRIDS for
bringup
Change-Id: I974793b65af5dd43ca25a63e74127232c7b65a7e