Deprecate mRequestUpdateCursorAnchorInfoMonitorMode part 3

This is the third step towards deprecating

 InputMethodManager#mRequestUpdateCursorAnchorInfoMonitorMode,

which was introduced as a minimum implementation to support
CursorAnchorInfo API in EditText [1].

With this CL, mRequestUpdateCursorAnchorInfoMonitorMode is effectively
deprecated and does nothing except for methods marked with
@UnsupportedAppUsage.

All the remaining valid usages will be handled by the following newly
introduced fields:

 - Editor.InputMethodState#mUpdateCursorAnchorInfoMode
 - Editor.InputMethodState#mUpdateCursorAnchorInfoFilter

 [1]: I3c6b69bd9d79b199afe68d838f25effa6048e5cc
      cf8421df856a5950729ff1d0e73f21d480aa98fb

Bug: 236713697
Test: atest CtsInputMethodTestCases:InputMethodServiceTest#testOnUpdateCursorAnchorInfo
Test: atest CtsInputMethodTestCases:StylusHandwritingTest
Change-Id: I9fc930fbe39c3bdf913e3d7012fdd22805564d3b