Remove mIsHalfWidth field from ContextualCard

mIsHalfWidth in ContextualCard is too generic to identify its
responsibility, it is used to hold the value of is_support_half from
database and used to decide the card width. Also, it limits the
relationship of CardType-to-Renderer not to be extended to one-to-many.

To deal with this, we replaced mIsHalfWidth with mViewType to implement
one-to-many relationship of CardType-to-Renderer, and removed all
related logic of mIsHalfWidth.

Bug: 121303357
Test: robotests, visual

Change-Id: I03e14392272194424f317d11bf9d0d794a6133f4

src/com/android/settings/homepage/contextualcards/conditional/HotspotConditionController.java

@@ -99,7 +99,7 @@ public class HotspotConditionController implements ConditionalCardController {
                 .setTitleText(mAppContext.getText(R.string.condition_hotspot_title).toString())
                 .setSummaryText(getSummary().toString())
                 .setIconDrawable(mAppContext.getDrawable(R.drawable.ic_hotspot))
-                .setIsHalfWidth(true)
+                .setViewType(ConditionContextualCardRenderer.VIEW_TYPE_HALF_WIDTH)
                 .build();
     }