Having a hint makes sure the cursor is positioned in the right
end of the text field by default for both LTR and RTL locales.
This fixes the user dictionary "add to dictionary" interface
parts, and the "connect to hidden network" interface.
Bug: 8654823
Change-Id: I7c83d35734e53da94bb949e362c5260934ef0b76
This is only the interface. It doesn't do anything yet, so as to
avoid a too large change.
Bug: 6026080
Change-Id: I0c7f0c09f71e01b18fcb3566a3c6c4b0f0b2a0fc
