sync status bar transparency state on theme change

When the status bar view is reinflated its transparency mode is
reset back to opaque. This can be observed by changing a theme
and switching to home in the middle of a switch.

Change-Id: I3049c5f24cc6c46dcefb24188039a08503db09a9

Patchset: 1
http://review.cyanogenmod.org/#/c/65394/