Add assertion that driving state has changed to CarUserManagerHostTest#testSwitchUserUxRestrictionFailure

On seahawk this test was failing intermittently. Add an assertion that the car driving state has changed before switching users.

MUST_SLEEP

Test: atest CarUserManagerHostTest#testSwitchUserUxRestrictionFailure
Bug: 279246646
Change-Id: I99f8595d75dfc063a9b4b80455ce82a1f302f9cb
1 file changed