python: common base handle for SPI + USB (#1231)

* base handle

* usb handle

* rm

* more types

python/usb.py

@@ -0,0 +1,23 @@
+from typing import List
+
+from .base import BaseHandle
+
+class PandaUsbHandle(BaseHandle):
+  def __init__(self, libusb_handle):
+    self._libusb_handle = libusb_handle
+
+  def close(self):
+    self._libusb_handle.close()
+
+  def controlWrite(self, request_type: int, request: int, value: int, index: int, data, timeout: int = 0):
+    return self._libusb_handle.controlWrite(request_type, request, value, index, data, timeout)
+
+  def controlRead(self, request_type: int, request: int, value: int, index: int, length: int, timeout: int = 0):
+    return self._libusb_handle.controlRead(request_type, request, value, index, length, timeout)
+
+  def bulkWrite(self, endpoint: int, data: List[int], timeout: int = 0) -> int:
+    return self._libusb_handle.bulkWrite(endpoint, data, timeout)
+
+  def bulkRead(self, endpoint: int, length: int, timeout: int = 0) -> bytes:
+    return self._libusb_handle.bulkRead(endpoint, length, timeout)
+