Update KeyBoardView to reflect the interaction model in Latin IME

A new patch checked in Latin IME makes it behave like any other Views. Touch
explore announces the letter under the finger and subsequent tap types in the
letter. Making KeyBoardView consistent with that.

bug:5552217

Change-Id: Ifeb6c3f071a5d64d0a16de584bf04ea40fff62fc
1 file changed