Add onUdfpsLocationChanged callback

SysUi controllers can't rely on the onConfigurationChanged
callback to update the udfps location , because that's also
the same callback that AuthController relies on to update the
udfps location and there's no guarantee that the AuthController
will get the #onConfigurationChanged call before the rest of the
controllers.

Test: manual, atest SystemUITests
Fixes: 223116689
Change-Id: I03f4a0f98f866041178fbd92e1cff744048dc270