TrustCredentials listview should be expanded by default

TrustCredentials listview should be expanded by default

UI Change for 2-profile case:
1. When both personal and work listview are expanded, half height is allocated for each list view
2. When only one listview is expanded, full height is allocated to the list view

Video can be found at go/trust-cred-split-view

- Use 2 ListView instead of 1 ExpandableListView in order to scoll the list independently
- The ui is not changed for only one or more than 3 profiles.
- Remove TrustedCertificateAdapterCommons, and wrap GroupAdapter by ChildAdapter in order to re-use more codes
- clear mAliasLoaders in onDestroy. (Seems it's a bug.)
- When work mode or fbe locked, force to collapse work list view. User message will be prompted when user press on header
- Groups in GroupAdapter is set synchronously instead of async, since we assume the number of users are fixed during initialization
- DataSet events will go through GroupAdapter to notifiy ChildAdapter

Bug:28236955
Change-Id: Iebfcd3fcb6515b42687e133b11696c42db63d18f