Rebind callback to tile even when tiles dont change.

When tiles don't change, we are not re-creating the views, but still
make sure that the callback is rebound (in case that it was removed
somewhere else).

Test: manual, modify tiles and check that QQS still receives updates
Test: atest PlatformScenarioTests
Fixes: 305605894
Flag: NONE
Change-Id: I75b9954a1613c5b8729aa18096e0050451efda9b