Usb Gadget HAL: support uwb bootmode

Create a new bootmode "uwb" which will enable ACM port

Bug: 187877902
Test: ACM port can be enabled
Signed-off-by: Puma Hsu <pumahsu@google.com>
Change-Id: I59ba51fb971b5078ce4462d4724057eee4ea788d
1 file changed