Merge "Add allowRedundantMoreKeys attribute"

java/res/values/attrs.xml

java/res/xml/keyboard_layout_set_nordic.xml

java/res/xml/keyboard_layout_set_swiss.xml

java/src/com/android/inputmethod/compat/CharacterCompat.java

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

...c/com/android/inputmethod/keyboard/KeyboardLayoutSet.java

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

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

.../com/android/inputmethod/keyboard/internal/KeysCache.java

...om/android/inputmethod/keyboard/internal/MoreKeySpec.java

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

...d/inputmethod/keyboard/layout/tests/DanishCustomizer.java

.../inputmethod/keyboard/layout/tests/FinnishCustomizer.java

...nputmethod/keyboard/layout/tests/NorwegianCustomizer.java

.../inputmethod/keyboard/layout/tests/SwedishCustomizer.java

...ndroid/inputmethod/keyboard/layout/tests/TestsDanish.java

.../inputmethod/keyboard/layout/tests/TestsDanishQwertz.java

...droid/inputmethod/keyboard/layout/tests/TestsFinnish.java

...inputmethod/keyboard/layout/tests/TestsFinnishQwerty.java

...oid/inputmethod/keyboard/layout/tests/TestsNorwegian.java