Change usb_gadget_hal permission from root to system
to be safer.
Bug: 228262168
Test: atest VtsAidlUsbHostTest / mtp,tethering,adb work /
all the folder user and group change to system
Signed-off-by: Ricky Niu <rickyniu@google.com>
Change-Id: Ibc99c756eb3003a6bb79d35173b125b38db04386