Make sure the fragment manager is passed to BubblePreferenceController

This wasn't being set always / at least for the app specific page.
This CL ensures it is & makes it so that there is only 1 constructor.

Fixes: 132864244
Test: make -j40 RunSettingsRoboTests ROBOTEST_FILTER=Bubble
Change-Id: I9c422e75583b3091d1571cfb8cc43ec49b801599