Fix up open bugs from gs201 AIDL migration

1. Remove unused group "wakelock".
2. Correct the right return value on setCurrentUsbFunctions.

Bug: 266694076
Test: Boot to home and function work
Change-Id: If0925a61e481e4deca560dc8dfc1be80a76c148f
(cherry picked from commit 5c7e338667a7f21c27f5789c16a4781dcbbe8755)

usb/gadget/UsbGadget.cpp

@@ -530,9 +530,7 @@ ScopedAStatus UsbGadget::setCurrentUsbFunctions(long functions,
     }
 
     ALOGI("Usb Gadget setcurrent functions called successfully");
-    return ScopedAStatus::fromServiceSpecificErrorWithMessage(
-                -1, "Usb Gadget setcurrent functions called successfully");
-
+    return ScopedAStatus::ok();
 
 error:
     ALOGI("Usb Gadget setcurrent functions failed");

usb/gadget/android.hardware.usb.gadget-service.rc

@@ -1,8 +1,7 @@
 service vendor.usb-gadget-hal /vendor/bin/hw/android.hardware.usb.gadget-service
     class hal
     user system
-    group system shell mtp wakelock
-    capabilities WAKE_ALARM BLOCK_SUSPEND
+    group system shell mtp
 
 on post-fs
     chown root system /sys/class/typec/port0/power_role