fastboot: Remove '\n' from interface name on linux
If the device provides an interface string, we should remove the newline
from the read file that is added from by the linux kernel.
Bug: 324320178
Test: Ran the same command with my local changes vs not
```
bash$ ./fastboot devices -l
5f42ad5ad259c90cf14ea222791b6aaa fastboot usb:7-3
bash$ fastboot devices -l
5f42ad5ad259c90cf14ea222791b6aaa fastboot
usb:7-3
```
Change-Id: Ida3316fdba8e35f0c66784f83455a4d82e90ba1c
diff --git a/fastboot/usb_linux.cpp b/fastboot/usb_linux.cpp
index b7fd5ed..72e326a 100644
--- a/fastboot/usb_linux.cpp
+++ b/fastboot/usb_linux.cpp
@@ -269,6 +269,9 @@
auto path = android::base::StringPrintf("/sys/bus/usb/devices/%s/%s:1.%d/interface",
sysfs_name, sysfs_name, ifc->bInterfaceNumber);
if (android::base::ReadFileToString(path, &interface)) {
+ if (!interface.empty() && interface.back() == '\n') {
+ interface.pop_back();
+ }
snprintf(info.interface, sizeof(info.interface), "%s", interface.c_str());
}