Reduce max suggestion to show to 2.

- since we now either have 1 or 2 suggestions, putting most layout
configuration in the xml instead of dynamically setting it in code.
- remove the suggestion header
- vertical center align the suggestion title text for 2 cards to make
the card with single line looks better.
- tint all suggestions icons.

Change-Id: I0130f15d530264e164e5afd7c091f165a4a6adc2
Fixes: 70573674
Fixes: 73293989
Fixes: 64986736
Test: visual and make RunSettingsRoboTests

src/com/android/settings/dashboard/DashboardAdapter.java

@@ -304,14 +304,7 @@ public class DashboardAdapter extends RecyclerView.Adapter<DashboardAdapter.Dash
         // header anymore.
         final List<Suggestion> suggestions =
             (List<Suggestion>) mDashboardData.getItemEntityByPosition(position);
-        final int suggestionCount = suggestions.size();
-        final Typeface fontMedium = Typeface.create(
-            mContext.getString(com.android.internal.R.string.config_headlineFontFamilyMedium),
-            Typeface.NORMAL);
-        holder.title.setTypeface(fontMedium);
-        if (suggestions != null && suggestionCount > 0) {
-            holder.summary.setText("" + suggestionCount);
-            holder.summary.setTypeface(fontMedium);
+        if (suggestions != null && suggestions.size() > 0) {
             mSuggestionAdapter.setSuggestions(suggestions);
             holder.data.setAdapter(mSuggestionAdapter);
         }