Fails here on Linux dbgutil like this:

======================================================================
ERROR: test_validation (calc.ManualCalcTests)
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Traceback (most recent call last):
  File "uitest/manual_tests/calc.py", line 133, in test_validation
    self.ui_test.execute_blocking_action(enter_text, "ok", args=("B6", "2.18"))
  File "uitest/uitest/test.py", line 191, in execute_blocking_action
    raise DialogNotExecutedException("did not execute a dialog for a blocking action")
uitest.test.DialogNotExecutedException: Dialog not executed for: did not execute a dialog for a blocking action

Change-Id: I2004eb52ce0846ada7ed38dc19d71258d2272ad5