Merge "Support per-Key and per-Keyboard key visual attributes" into jb-mr1-dev

java/res/values/attrs.xml

java/src/com/android/inputmethod/keyboard/Key.java

java/src/com/android/inputmethod/keyboard/Keyboard.java

java/src/com/android/inputmethod/keyboard/KeyboardView.java

...rc/com/android/inputmethod/keyboard/MainKeyboardView.java

...rc/com/android/inputmethod/keyboard/MoreKeysKeyboard.java

.../android/inputmethod/keyboard/internal/KeyDrawParams.java

...d/inputmethod/keyboard/internal/KeyPreviewDrawParams.java

...id/inputmethod/keyboard/internal/KeyVisualAttributes.java

...ndroid/inputmethod/keyboard/internal/KeyboardBuilder.java

...android/inputmethod/keyboard/internal/KeyboardParams.java