Merge remote-tracking branch \'goog/ub-calculator-algebra\' am: 61c83393 am: ec2413b2 -s ours

am: 38a4864d

* commit '38a4864d':
  Invoke View#performLongClick()
  Don't use Google proprietary launcher icon
  Add styles.xml for sw360dp-long-port.
  Allow clear if unprocessed chars
  Show/Hide Toolbar
  Persist "inv" selected state
  Tap to open/close advanced pad
  Always calculate textSize in CalculatorText#onMeasure
  Tune colors for accessibility
  Correctly set formula text size after rotation
  Fix factorial(0)
  Correct behavior with erroneous pasted text
  Account for scale in ActionMode.Callback2#onGetContentRect
  Cancel in-progress computations before saving state

Change-Id: Ia68453b08535e61a4fb9d1130fd7026fbf33f629