Remove ICS and Holo themes. Remove most png keyboard resources, replacing with xml shapes and colors

Bug: 15678343
Change-Id: I26e4d292deab37724387cc9ebc03033fcd698c60

This reverts commit c083255b.

Change-Id: I357bcafe7f28fe72b2b51b566dd59ac9c1c5b2fc

This reverts commit 9e7f0677.

Due to unit test breakage.

Change-Id: I664c25c17fc4cc98264bdac772eac086c9fbc183

Change-Id: Idc0670588bb51e6a2b3eac9489cb643db293815a

Change-Id: I50e79bbb1f2eab33c7e5a76086bbe41f7e757ada

Bug: 6326723
Change-Id: Idb6fa023c497cf1f0f584f496e7e5ae82b1c9f4f

Bug: 6187069
Change-Id: I7df18b470b7e746da601fab3311fb4b086f40d41

Bug: 6128215
Change-Id: I81e9980f8ffa5c5eaba30676c8433f542645de1d

Bug: 6128215
Change-Id: Ie9c13d9d38aad6e92cc465e22f3ef20c80e0a36a

Change-Id: Ic2f6d3f8fdd2c0b0a00f004f49f95b00d474ee4b

Change-Id: Ie4c85e8ca5a1f41a420aae5c1cd9c1cb07e237e5

Previously the key preview was implemented by PopupWindow.  The key
preview popup window would be dismissed and shown each time the key
was released and pressed.  It turned out that it was taking several
milliseconds.

This change implements the key preview by a simple TextView which will
be layout-ed at absolute coordinates within the screen FrameLayout.
And dismissing and showing the key preview is implemented by the
TextView's visibility.

This implementation needs careful coordination of candidates.xml
layout and LatinIME.onComputeInsets to control suggestion strip
visibility.

Bug: 4179964
Change-Id: Id6347cb35b91eb14ab20dd2f312e58b54b6625a7

TODO This animation style API of PopupWindow can be called only in
Gingrebread or later.  We should refactor this using reflection to be
able to be compatible with Froyo.

Bug: 3004787
Bug: 2973989
Change-Id: I2abfcc853b1a0af2bccee7bdf5fbd723456b7d34