python-adb: Quit early when trying to connect to a missing device.

adb/contrib/adb_commands_safe.py

Index: adb/contrib/adb_commands_safe.py
diff --git a/adb/contrib/adb_commands_safe.py b/adb/contrib/adb_commands_safe.py
index e7dcd5014acadb4111e5f76b001949e308dbeadb..ebc606fb4e9de015bd0c7cb6873bb0bdfaeb783c 100644
--- a/adb/contrib/adb_commands_safe.py
+++ b/adb/contrib/adb_commands_safe.py
@@ -773,12 +773,16 @@ class AdbCommandsSafe(object):
           # Do not kill adb, it just means the USB host is likely resetting and
           # the device is temporarily unavailable. We can't use
           # handle.serial_number since this communicates with the device.
+          # Might take a while for the device to come back. Exit early.
+          break
         except common.usb1.USBErrorNotFound as e:
           _LOG.warning(
               '%s._OpenHandle(): USBErrorNotFound: %s', self.port_path, e)
           # Do not kill adb, it just means the USB host is likely resetting (?)
           # and the device is temporarily unavailable. We can't use
           # handle.serial_number since this communicates with the device.
+          # Might take a while for the device to come back. Exit early.
+          break
         except common.usb1.USBErrorBusy as e:
           _LOG.warning('%s._OpenHandle(): USBErrorBusy: %s', self.port_path, e)
           KillADB()