Merge "Refactor keyboard layout unit tests"

...s/src/com/android/inputmethod/keyboard/layout/Arabic.java

...android/inputmethod/keyboard/layout/ArmenianPhonetic.java

...s/src/com/android/inputmethod/keyboard/layout/Azerty.java

.../src/com/android/inputmethod/keyboard/layout/Bengali.java

...om/android/inputmethod/keyboard/layout/BengaliAkkhor.java

...rc/com/android/inputmethod/keyboard/layout/Bulgarian.java

...com/android/inputmethod/keyboard/layout/BulgarianBds.java

.../src/com/android/inputmethod/keyboard/layout/Colemak.java

...s/src/com/android/inputmethod/keyboard/layout/Dvorak.java

...c/com/android/inputmethod/keyboard/layout/EastSlavic.java

tests/src/com/android/inputmethod/keyboard/layout/Farsi.java

...src/com/android/inputmethod/keyboard/layout/Georgian.java

tests/src/com/android/inputmethod/keyboard/layout/Greek.java

...s/src/com/android/inputmethod/keyboard/layout/Hebrew.java

tests/src/com/android/inputmethod/keyboard/layout/Hindi.java

...com/android/inputmethod/keyboard/layout/HindiCompact.java

.../src/com/android/inputmethod/keyboard/layout/Kannada.java

tests/src/com/android/inputmethod/keyboard/layout/Khmer.java

tests/src/com/android/inputmethod/keyboard/layout/Lao.java

...c/com/android/inputmethod/keyboard/layout/LayoutBase.java