Merge "Configurable key long press timeout"

java/res/values/attrs.xml

java/res/values/config.xml

java/res/values/strings.xml

java/res/values/styles.xml

java/res/xml/prefs.xml

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

java/src/com/android/inputmethod/latin/Settings.java

java/src/com/android/inputmethod/latin/SettingsFragment.java

java/src/com/android/inputmethod/latin/SettingsValues.java