Add hints in Overview

If the ENABLE_HINTS_IN_OVERVIEW flag is enabled, pulls chip hint
data (currently from the NavBarHint plugin; eventually from AiAi)
and shows the chips between the task view screenshot and the QSB.

Screenshot: https://screenshot.googleplex.com/Ww05W13XjBv

BUG:124390101

Change-Id: I7686673b705257eca31f2fa40e2744e197153c7c
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 296c951..7aea870 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -103,6 +103,10 @@
     public int folderChildTextSizePx;
     public int folderChildDrawablePaddingPx;
 
+    // Hints
+    public int chipHintHeightPx;
+    public int chipHintBottomMarginPx;
+
     // Hotseat
     public int hotseatCellHeightPx;
     // In portrait: size = height, in landscape: size = width
@@ -200,6 +204,9 @@
 
         workspaceCellPaddingXPx = res.getDimensionPixelSize(R.dimen.dynamic_grid_cell_padding_x);
 
+        chipHintHeightPx = res.getDimensionPixelSize(R.dimen.chip_hint_height);
+        chipHintBottomMarginPx = res.getDimensionPixelSize(R.dimen.chip_hint_bottom_margin);
+
         hotseatBarTopPaddingPx =
                 res.getDimensionPixelSize(R.dimen.dynamic_grid_hotseat_top_padding);
         hotseatBarBottomPaddingPx = (isTallDevice ? 0