Move phrase gesture from additional features to public.

java/res/xml/prefs.xml

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

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

...c/com/android/inputmethod/latin/DictionaryCollection.java

.../com/android/inputmethod/latin/DictionaryFacilitator.java

...android/inputmethod/latin/ExpandableBinaryDictionary.java

...m/android/inputmethod/latin/ReadOnlyBinaryDictionary.java

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

.../com/android/inputmethod/latin/inputlogic/InputLogic.java

...roid/inputmethod/latin/settings/NativeSuggestOptions.java

...putmethod/latin/settings/SettingsValuesForSuggestion.java

...latin/spellcheck/AndroidWordLevelSpellCheckerSession.java

.../android/inputmethod/latin/spellcheck/DictionaryPool.java

...ellcheck/SynchronouslyLoadedContactsBinaryDictionary.java

...n/spellcheck/SynchronouslyLoadedUserBinaryDictionary.java

native/jni/src/suggest/core/suggest_options.h

tools/dicttool/Android.mk