Removing TODO from test

In controller test, simulating profile with hideIndQuietMode set to true
in by mocking AppEntry is not possible. updateAppList() method is
assumed to already receive a filtered list of apps based on the
profile's quiet mode status which is called from onRebuildComplete().

Corresponding filters for this page has test in the underlying settingsLib ApplicationsStateTest file

Bug: 26013153
Test: Manual
Flag: EXEMPT only test file
Change-Id: I09ea3b279c40e0ee4806a80646a5dfcd3d3f784b