This change also introduces the following.
* space bar language switcher is enabled for phone device.
* get rid of spcae key icon from number keyboard of tablet.
* slightly lower the position of language name on space bar of tablet.
Bug: 3290290
Change-Id: I432be8f757bcc84c257770112ff1f6fa7970c584
This change introduces shiftedIcon attribute for Key which specifies
icon to draw the shift key while the key is in shifted state.
This change also intriduces new configurable dimension value
key_label_horizontal_alignment_padding which represents horizontal
padding for left or right alignment of key label.
Bug: 3216592
Bug: 3201839
Change-Id: I3aa7392227ce573c404517678e6340a8d1fcb328