This change also renames Key.keyLabelOption to keyLabelFlags.

Change-Id: Iedd0bfaa420ad382c07ce084416355690e390919

Bug: 5439635

Change-Id: Ic6ea1317f8892d5dbaaa7e0cbb274e8e06ea89d7

Also renames PopupPanel to MoreKeysPanel

Change-Id: I37209a5a8fe7dbba1eef03e3be88ba5253653926

The first key and the last of the row are automatically marked as left
and right edge key respectively.  The existence of Spacer will prevent
those automatic marking.

Bug: 5038844
Change-Id: Ie34169ceaf76e24923b8d8125eda6ecb95cf1fee

Bug: 4161983
Change-Id: Ie163cd17c87773bf2ca37fff7cff79611fff644f

Change-Id: I7147cab36eee4b6fd9418ca36e8ece2360b59e45

This change removes Russian keyboard layout exceptions and make it
compatible with other Latin's.

Also tweaks some locales' keyboard layout to match with standard PC's
keyboard layout at most.

Change-Id: I305201fb850b4f94ae7e746ab4c039473d09da70

This change introduces the following features to Keyboard XML format.

 * "keyXPos" can specify the key X coordinate directly.
 * "keyXPos" can be negative. The X coordinate will be calcluated from
    the right edge of the keyboard toward left.
 * "keyWidth" can be zero to be filled up to the right side.
 * "keyWidth can be negative. The key will be filled up to both sides.
 * Spacer's horizontalGap is renamed as keyWidth, and can be inherited
   from key-style.
 * Spacer can have keyXPos attribute.

Using these syntax, all keyboard layouts have been re-written.

Cherry-Pick: I314b2e8ca2aa145ff9506cbf927140a15685af42
Bug: 4442045
Change-Id: I048fe5eaef020d8472ab577e9d326042bae2f3fa

Change-Id: I45a29d753103d82b625e55e78f1075497e94396f

Ic4df2a9a introduced new keyboard layouts for Hebrew and Arabic.
This change adds a comment to them alongside with trailing
whitespace suppression.

This change explicitly limits its scope to files introduced by
Ic4df2a9a. It replaces I48927626 which has been deemed too reckless.

Change-Id: Id6b0e47f0623ead0b4e42e57dae359231a2b97fc

The Arabic keyboard is more or less based on PC keyboard and other
sources. It has no means to input diacritics at the moment.
Some data for the Hebrew keyboard was already there, but not used.
This change splits phone and tablet layout and consolidates the
tablet one to something that seems sensible. It can't input diacritics
either at the moment.

Other shortcomings affect those keyboards. For example, normal
Hebrew keyboards switch to capital QWERTY keyboard with shift on,
as there are no capital Hebrew characters, but this version does not
feature this.

It should be mostly possible already to enter Arabic or Hebrew with
these keyboards however.

Change-Id: Ic4df2a9a77ffd03c4f9ee2c47e03c0f43f8e48ae