Don't overzealously disable all preferences in airplane mode.

Only disable those prefs that actually need the network connection.
Fixes applying various preference summaries.

Change-Id: Id89a2572e382b28c1da100ebb1a1a73eb9233e35
Signed-off-by: anerikg <anerikgames@gmail.com>

Conflicts:
	src/com/android/phone/CallFeaturesSetting.java