Combine settings suggestion and condition.

- Add a flag in dashboard feature provider to specify whether to use the
combined UI for suggestions and conditions.
- Move Conditions below Suggestions.
- Add dashboard entity for condition and suggestion container, and
  wrap the condition and suggestion list inside the container. The
  container itself will be a single dashboard item, and within it will
  be the list of suggestion or condition.
- Add suggestion/condition header that will show the combined info for
  the conditions and suggestion data, and have the expand button to
  control expanding both the suggestion and condition list.
- Change the individual condition card to be always expanded, and
remove the logic to collapse/expand individual condition card.
- Remove the divider between the action button and condition detail
  within each condition card.
- Add suggestion/condition footer for collapsing the whole suggestion and
  condition list.

Bug: 37645754
Test: make RunSettingsRoboTests
Change-Id: I86df75f7e4551778f79d730851c03121fd0dcbdf

tests/robotests/src/com/android/settings/dashboard/DashboardAdapterTest.java

@@ -163,14 +163,6 @@ public class DashboardAdapterTest {
         assertThat(holder.itemView.getBackground()).isInstanceOf(ColorDrawable.class);
     }
 
-    @Test
-    public void testSetConditions_AfterSetConditions_ExpandedConditionNull() {
-        mDashboardAdapter.onExpandClick(mView);
-        assertThat(mDashboardAdapter.mDashboardData.getExpandedCondition()).isEqualTo(mCondition);
-        mDashboardAdapter.setConditions(null);
-        assertThat(mDashboardAdapter.mDashboardData.getExpandedCondition()).isNull();
-    }
-
     @Test
     public void testSuggestionsLogs_NotExpanded() {
         setupSuggestions(makeSuggestions("pkg1", "pkg2", "pkg3"));