patch compatibility with PyPortal, conditionally import cursor or touchscreen

Author: brentru

adafruit_pyoa.py

@@ -50,9 +50,15 @@
 import board
 from digitalio import DigitalInOut
 import displayio
-import adafruit_touchscreen
-from adafruit_cursorcontrol.cursorcontrol import Cursor
-from adafruit_cursorcontrol.cursorcontrol_cursormanager import CursorManager
+try:
+    import adafruit_touchscreen
+except ImportError:
+    pass
+try:
+    from adafruit_cursorcontrol.cursorcontrol import Cursor
+    from adafruit_cursorcontrol.cursorcontrol_cursormanager import CursorManager
+except ImportError:
+    pass
 import audioio
 from adafruit_display_text.label import Label
 from adafruit_button import Button