Add transient taskbar UI

This change is only for the visual appearance of the
transient taskbar.

Bug: 252905206
Test: manual
Change-Id: I4990b20b39089a0c27ec2a72dd3010cf64ddba1d
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 1c26f04..edd809c 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -312,7 +312,9 @@
         }
 
         if (isTaskbarPresent) {
-            taskbarSize = res.getDimensionPixelSize(R.dimen.taskbar_size);
+            taskbarSize = DisplayController.isTransientTaskbar(context)
+                    ? res.getDimensionPixelSize(R.dimen.transient_taskbar_size)
+                    : res.getDimensionPixelSize(R.dimen.taskbar_size);
             stashedTaskbarSize = res.getDimensionPixelSize(R.dimen.taskbar_stashed_size);
         }