The time and data pickers did not support IME editor action correctly.

1. Updated TextView to traverse all focusable items. It was searching focus
   down and up and was missing right and left focusabled. Updated the focus
   seach to use FOCUS_FORWARD and FOCUS_BACKWARD - now all focusable views
   are visited.

2. TimePicker and DatePicker were not specifying the IME options for
   the next and done editor actions.

bug:5264046

Change-Id: Ief80863fc312582f2f76928bf6e915f620c427e5