use 3.9 for now

.github/workflows/functional-test.yml

@@ -65,10 +65,10 @@ jobs:
         appium plugin install execute-driver
         nohup appium --use-plugins=images,execute-driver --relaxed-security --log-timestamp --log-no-colors > appium.log &
 
-    - name: Set up Python 3.12
+    - name: Set up Python 3.9
       uses: actions/setup-python@v3
       with:
-        python-version: 3.12
+        python-version: 3.9
 
     - run: |
         # Separate 'run' creates differnet pipenv env. Does them in one run for now.
@@ -162,10 +162,10 @@ jobs:
         disable-animations: false
         script: echo "Generated AVD snapshot for caching."
 
-    - name: Set up Python 3.12
+    - name: Set up Python 3.9
       uses: actions/setup-python@v3
       with:
-        python-version: 3.12
+        python-version: 3.9
 
     - name: run tests
       uses: reactivecircus/android-emulator-runner@v2