Fix NPE in dock mode.

Add the call recording button also to the landscape layout. Also
properly add (and hide) button spacers.

Change-Id: Idc4c7669a78a7445a421bc28bd527f6d423f5c6a
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_InCallUI into android-4.4