Conserve expansion after re-inflation

We were updating most of the PhoneStatusBarView state during
re-inflation but not the expansion and its fraction.

Test: Pull down shade, run: adb shell service call overlay 4 s16 "com.android.systemui.theme.dark" i32 1 i32 0
Test: Switch to guest user, switch back
Test: Reboot, look at status bar
Change-Id: I41669fb32419ad02a11586ba248a68b47d450413
Merged-In: I41669fb32419ad02a11586ba248a68b47d450413
Fixes: 110530608
Fixes: 110147405
Fixes: 79122419