This change also renames Key.keyLabelOption to keyLabelFlags.

Change-Id: Iedd0bfaa420ad382c07ce084416355690e390919

This is a followup change for I37209a5a.

Change-Id: I17cf4596034ed900cb4c769f89a2607a53b19c0a

Also renames PopupPanel to MoreKeysPanel

Change-Id: I37209a5a8fe7dbba1eef03e3be88ba5253653926

Bug: 4161983
Change-Id: Ie163cd17c87773bf2ca37fff7cff79611fff644f

Bug: 4170083
Change-Id: I977d7f6cce08e35fe9bed46fe5f4fdedd1f12e9c

This change introduces:

* New KeyboardView attribute
  * keyLargeLetterRatio to specify large letter text size.
  * keyHintLabelRatio to specify hint label text size.
  * keyHintLabelColor to specify hint label text color.
  * keyPreviewTextRatio to specify key preview text size.
* New Key.keyLabelOption flags
  * alignLeftOfCenter, align the key label slightly left of the key center.
  * largeLetter, use keyLargeLetterRatio to draw key letter.
  * hasHintLabel, draw keyHintLabel at the right of key letter.
  * followKeyHintLabelRatio, draw the key label following keyHintLabelRatio size.
* Renames
  * Key.keyHintLetter to keyHintLabel.
  * Key.keylLabelOption fontFixedWidth to fontMonoSpace.
  * Key.keylLabelOption popupHint to hasPopupHint.
* Removes
  * number icon releted attributes and declarations.

Change-Id: I2f456737e3a46209e5f48b5155951b2b21a33859

This change also removes manualTemporaryUpperCaseCode and
manualTemporaryUpperCaseHintIcon.  Instead of these keyLabelOption now
has hasUppercaseLetter flag value.

Bug: 4436327
Change-Id: I88fdac1e888a7123735296f5ef45f5fdd565cd2e

Unfortunately current Master seems have bugs in resource
selection. The xml-en/kbd_qwerty.xml is added to avoide those issue as
work around, and must be removed if the issue is fixed.

Bug: 4442045
Change-Id: Ic43d66e8669fb63e2c3f0b8b9aae9178ca3c32b5

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.

Bug: 4442045
Change-Id: I314b2e8ca2aa145ff9506cbf927140a15685af42