App chip refactor

- Adds background outline replacing 2 circles + rect approach. This
enables easier shadow drawing code.
- Simplify structure of AppChipView.
- Adds an anchor View to simplify laying out of menu around app chip

Bug: 313644427
Bug: 317007147
Fix: 322760765
Flag: ACONFIG com.android.launcher3.enable_grid_only_overview TEAMFOOD
Flag: ACONFIG com.android.launcher3.enable_overview_icon_menu TEAMFOOD
Test: OverviewImageTest
Change-Id: I56c2644779863c083ae475a740a84321b1d0c396

src/com/android/launcher3/DeviceProfile.java

@@ -260,7 +260,6 @@ public class DeviceProfile {
     public int overviewTaskIconSizePx;
     public int overviewTaskIconDrawableSizePx;
     public int overviewTaskIconDrawableSizeGridPx;
-    public int overviewTaskIconAppChipMenuDrawableSizePx;
     public int overviewTaskThumbnailTopMarginPx;
     public final int overviewActionsHeight;
     public final int overviewActionsTopMarginPx;
@@ -686,8 +685,6 @@ public class DeviceProfile {
                 res.getDimensionPixelSize(R.dimen.task_thumbnail_icon_drawable_size);
         overviewTaskIconDrawableSizeGridPx =
                 res.getDimensionPixelSize(R.dimen.task_thumbnail_icon_drawable_size_grid);
-        overviewTaskIconAppChipMenuDrawableSizePx = res.getDimensionPixelSize(
-                R.dimen.task_thumbnail_icon_menu_drawable_size);
         overviewTaskThumbnailTopMarginPx =
                 enableOverviewIconMenu() ? 0 : overviewTaskIconSizePx + overviewTaskMarginPx;
         // Don't add margin with floating search bar to minimize risk of overlapping.
@@ -2163,8 +2160,6 @@ public class DeviceProfile {
                 overviewTaskIconDrawableSizePx));
         writer.println(prefix + pxToDpStr("overviewTaskIconDrawableSizeGridPx",
                 overviewTaskIconDrawableSizeGridPx));
-        writer.println(prefix + pxToDpStr("overviewTaskIconAppChipMenuDrawableSizePx",
-                overviewTaskIconAppChipMenuDrawableSizePx));
         writer.println(prefix + pxToDpStr("overviewTaskThumbnailTopMarginPx",
                 overviewTaskThumbnailTopMarginPx));
         writer.println(prefix + pxToDpStr("overviewActionsTopMarginPx",