FW: Fix Potential FC on Hiding NavBar

If you touched/swiped the NavBar just as it was
trying to hide, you could get a FC.  This
catches those errors and just puts the status
back into hidden mode.

Change-Id: I03220d10d23b94716c28b748defcb39a525a2aa7
Signed-off-by: Zaphod <mwilson@acesappraisal.com>

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java