Allow tensorflow in place of tflite

As a distro we are packaging tensorflow, but not tflite. The latter is a
small cut-out of tensorflow, so they share the same entrypoint.

This allows us to provide tensorflow in place of tflite, at the cost of
a higher runtime closure size, but reduced maintenance load.

Author: mweinelt

programs/wake/openwakeword-lite/bin/server/openwakeword.py

@@ -3,7 +3,10 @@
 from typing import List
 
 import numpy as np
-import tflite_runtime.interpreter as tflite
+try:
+    import tflite_runtime.interpreter as tflite
+except ModuleNotFoundError:
+    from tensorflow.lite.python.interpreter import Interpreter as tflite
 
 from wyoming.wake import Detection
 

programs/wake/openwakeword-lite/server/wyoming_openwakeword/openwakeword.py

@@ -4,7 +4,10 @@
 from typing import List, Optional, TextIO
 
 import numpy as np
-import tflite_runtime.interpreter as tflite
+try:
+    import tflite_runtime.interpreter as tflite
+except ModuleNotFoundError:
+    from tensorflow.lite.python.interpreter import Interpreter as tflite
 
 from wyoming.wake import Detection
 

programs/wake/precise-lite/bin/precise_shared.py

@@ -24,7 +24,10 @@
 from typing import Any, Optional, Union
 
 import numpy as np
-import tflite_runtime.interpreter as tflite
+try:
+    import tflite_runtime.interpreter as tflite
+except ModuleNotFoundError:
+    from tensorflow.lite.python.interpreter import Interpreter as tflite
 from sonopy import mfcc_spec
 
 MAX_WAV_VALUE = 32768