Refactor ChooseLockGenericController

* Move all logics around aggregating password policies
  to the controller
* Replace HIDE_DISABLED_PREFS and MINIMUM_QUALITY_KEY
  with HIDE_INSECURE_OPTIONS as all call sites are just
  using them to hide insecure screenlock options.
* Remove password policy aggregation logic from
  ChooseLockPassword and make it use policies passed in.
* Remove padlock from disabled screen lock options,
  per UX mock.
* Increase char limit for some strings

Bug: 177638284
Bug: 177641868
Bug: 182561862
Test: m RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.password
Test: 1. set profile password quality/complexity and enroll device lock
      2. set profile password quality/complexity and enroll work challenge
      3. set parent password quality/complexity and enroll device lock
      4. set parent password quality/complexity and enroll work challenge
      5. set profile and parent password complexity, then enroll work challenge
      6. set profile and parent password complexity, then unify work challenge
      7. Enroll device lock during SUW
Change-Id: Iba1d37e6f33eba7b7e8e1f805f8e37aaec108404