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
diff --git a/usb/UsbGadgetUtils.cpp b/usb/UsbGadgetUtils.cpp
index 4df6215..7b4d35d 100644
--- a/usb/UsbGadgetUtils.cpp
+++ b/usb/UsbGadgetUtils.cpp
@@ -100,7 +100,7 @@
     if (vendorFunctions != "") {
         ret = vendorFunctions;
     } else if (bootMode == "usbradio" || bootMode == "factory" || bootMode == "ffbm-00" ||
-               bootMode == "ffbm-01") {
+               bootMode == "ffbm-01" || bootMode == "uwb") {
         if (persistVendorFunctions != "")
             ret = persistVendorFunctions;
         else