Implementing keyboard indicator dialog

Dialog is not using xml resource as currently number of steps is flexible and comes from API call. That means everything in the view is built dynamically.

Flag: KEYBOARD_BACKLIGHT_INDICATOR
Fixes: 268650355
Test: manual + will add unit tests for the whole path in future CLs
Change-Id: I35179c73dd1bba9962e3881d74209760d1d7dac5
5 files changed