This eliminates the requirement that all sensors share a single file descriptor.
This, along with concurrent changes in other projects, fixes bugs b/1614524 and b/1614481
Signed-off-by: Mike Lockwood <lockwood@android.com>
If the battery files can't be found return status_unkown instead of an
error. On systems where we haven't brought up battery stats yet they
assume the battery is dead and turn off as soon as the runtime starts
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
