Fix heads up action bar switch handling for tablets.

Similar to commit 91f47b9f55467f1c8de4c6c732375d9f6f3c3942.

Change-Id: Ia4c5e8169ccd6786d2284eccec30397cac48d218
Settings: Make settings searchable.

Signed-off-by: Adnan Begovic <adnan@cyngn.com>
Signed-off-by: Danesh Mondegarian <danesh@cyngn.com>
Change-Id: Ic06dca33bf8fd0ef8f63f51e131b70fe730cb7c5

Conflicts:
	AndroidManifest.xml
	res/values/attrs.xml
	res/xml/settings_headers.xml
	src/com/android/settings/Settings.java
Settings: Check to see if menu items are null onPause.

Change-Id: I5463b1eab1017840ec1ec204090c9c61603377a3