Root cause: Show default status until setting key changed. It does not
show latest status when created.
Solution: Update the status when created.
Bug: 229566130
Test: make RunSettingsRoboTests ROBOTEST_FILTER=FloatingMenuTransparencyPreferenceControllerTest
Change-Id: Ia25fe5cec0444c1771e8ce31aae2a4cb3b0405a1
Root Cause: Store value in opacity value, need to be inverted to
transparency value.
Solution: transfer to transparency value and rename related field.
Bug: 183980065
Test: atest FloatingMenuTransparencyPreferenceControllerTest
Change-Id: I763dda47854e7cf945a95f4a7d4965725cd73824