am a90b7f01: Add methods to InputConnection: setComposingRegion() to select a region of text for correction, and getSelectedText() to return the selected text.

Merge commit 'a90b7f0125389b9e1040d2be82aad4ef74ea6071' into gingerbread-plus-aosp

* commit 'a90b7f0125389b9e1040d2be82aad4ef74ea6071':
  Add methods to InputConnection: setComposingRegion() to select a region of text for correction, and getSelectedText()