remove some spaces

Change-Id: I031297ecc58aab96b0fe6c25fb0811c0ef2d37fe
add inquiry_string
set /sys/class/android_usb/f_mass_storage/inquiry_string "Dell Streak 7" on boot

Change-Id: If338bbe0e669a15544c0de87013fc9d783e51dec
Revert "remove remaining {}"
Doesn't seem to have any impact

This reverts commit 5b921cc38033cd0325f5fa63e2fcf7fd4d1f49e2.
But maybe make all remaining $sys.usb.config consistent with {}