1. When the system removes the last known stylus device and has no other stylus available, remove the Ink window. 2. Create InkWindow only if the device+IME combination supports handwriting and the stylus is being used. Bug: 243571274 Bug: 239121683 Bug: 210039666 Test: atest StylusHandwritingTest Change-Id: Icd3eea91fe144cff7100d3ecf19191c064c0d196