Call adjustStatusBarLocked on UserSwitchComplete

Some race conditions in UserSwitch and previous calls to ajdustStatusBar might cause
StatusBarManagerService to receive incorrect last known state for the
current user. Calling adjustStatusBarLocked on UserSwitchComplete
ensures the current state is relayed, and since this funciton is
idempotent recalling the function should be harmless.

Bug: 431821706
Bug: 439645242
Test: Manual
Flag: EXEMPT bugFix
Change-Id: I09d2b42bca520ddd76c2ef65c8610d421575c0c9