Uninstall android-34 on the GHA machines (#770)

Author: a-maurice

scripts/gha/build_testapps.py

@@ -556,7 +556,8 @@ def patch_android_env(unity_version):
     # but currently the GitHub runners have 33 as their max.
     logging.info("Uninstall Android platform android-33")
     _run([sdkmanager_path, "--uninstall",
-          "platforms;android-33", "platforms;android-33-ext4", "platforms;android-33-ext5"], check=False)
+          "platforms;android-33", "platforms;android-33-ext4", "platforms;android-33-ext5",
+          "platforms;android-34"], check=False)
   except Exception as e:
     logging.exception("Failed to uninstall Android platform android-33")