Bug: 3194695
Change-Id: I602f350882d6e3cb68ae971c1891b887b1f5a510

Bug: 3253559
Change-Id: Iba0b7488e112d5f136f6c1a7bfbeab0dac298d54

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

Bug: 3222319
Change-Id: Ibc56cd69c30aee19f26fe11e7ea176ff01e21dbe

Bug: 3216592
Change-Id: I9950292184d9d0e131f76498067b0a6cb462a0ab

This change partially implements the requested feature. The following
are not supported yet.
- Non-letter key handling on automatic temporary upper case layout.
- Non-letter key handling on shift chording in caps lock layout.
- Hint icons for manual temporary upper case layout are not final ones.

Bug: 3193390

Change-Id: I636da99d1be05b1337935d87c6f4d140661e1cc8

This is follow up change of I0d92e513757e765d9de98561205754af5a143650

Change-Id: Ibfe8835bb184636e5fb06473cc864852b573fbd4

Change-Id: I0d92e513757e765d9de98561205754af5a143650