Settings : Update gesture preference check

Move the gesture outside the stylus dependency check and remove the
preference category if no children are found

Change-Id: I05ecf71dc84f5244200e3030b5ee524944339145

Conflicts:
	src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java

	modified:   src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java
Allow changing screen-off animation (2/2)

* Allow enabling/disabling screen-off animation
* Allow selection between fade & crt effects if the device allows it

Change-Id: I5ebfab22e68ea34e3babfaacd9c8103e25932d3d