add menu arrow keys toggle

Change-Id: I7d6c1fd8ab808364deade52fd6da19a5e6785fa7
Signed-off-by: Roman Birg <romanbirg@gmail.com>

Conflicts:
	res/values/strings.xml
	res/xml/prefs_navbar.xml
	src/com/android/settings/carbon/Navbar.java
RC: Hiding NavBar

PS1: Adjustable Height and Timeout
PS2: Use navbar height for the hidden window navbar.
PS3: Add enable option
PS4: gotta restart systemui to make sure if this is disabled
     the tiny window is not left up
PS5: rebase
PS6: add controls for invisible and width
ps7: add navbarhide quick tile to arrays
ps8: set defautl slidder width to 5
PS9: Set Dependencies on Prefs.
ps10: Provide Opacity control for DragHandle
ps 11: Remove Dependency on Seekbars - they don't play well

Change-Id: I8e9c2c4e142f13965e3754caf53ae1d4040af4c7

Conflicts:
	res/values/arrays.xml
	res/values/strings.xml
	src/com/android/settings/carbon/Navbar.java