Finish renaming requestUpdateCursorAnchorInfo() to requestCursorUpdates()

This is a follow up CL to my previous CL [1] in Android L, which
renamed

  InputConnection#requestUpdateCursorAnchorInfo()

to

  InputConnection#requestCursorUpdates()

per API council feedback before that API was finally published.

Although its API surface has been correctly renamed, there have been
several uses of its older name in our internal code.  This CL also
updates such internal uses to avoid confusions.

As this is a purely mechanical renaming, there should be no behavior
change in this CL.

 [1]: I772c48ff18918e48a81e807b48ff907614485c09
      d8636ea7

Bug: 192412909
Test: atest
Change-Id: I75701a5a32d52283497208013c28ceb75c1adfa9