When possible, remove or simplify getNonIndexable() logic in fragments,
and use searchable="false" in xml to suppress index.
Change-Id: I5bdf5bc7d5494a64cdd9e230a51321a4b210af69
Fixes: 112608186
Test: robotest and manual search
- Move preference related logic to Controller
- Add settings:controller in xml file
Bug: 73899467
Test: manual
Test: make RunSettingsRoboTests
Change-Id: I3eaccc617c4408f50110bf1f5df3482f491f7393
Signed-off-by: rafftsai <rafftsai@android.com>