Implement light mode for persistent Taskbar.

NavbarButtonsViewController has been massaged to make sure the buttons
contrast well with the color of the Taskbar background that they are on,
if applicable.

Test: Manual
Fix: 268052229
Change-Id: I917a1a1be013c304910b0f674ae8a13abb8e47a1
Merged-In: I917a1a1be013c304910b0f674ae8a13abb8e47a1

quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java

@@ -25,7 +25,6 @@ import static com.android.quickstep.TaskAnimationManager.ENABLE_SHELL_TRANSITION
 
 import android.animation.Animator;
 import android.animation.AnimatorSet;
-import android.annotation.ColorInt;
 import android.os.RemoteException;
 import android.util.Log;
 import android.view.TaskTransitionSpec;
@@ -235,17 +234,10 @@ public class LauncherTaskbarUIController extends TaskbarUIController {
                 WindowManagerGlobal.getWindowManagerService().clearTaskTransitionSpec();
             } else {
                 // Adjust task transition spec to account for taskbar being visible
-                @ColorInt int taskAnimationBackgroundColor =
-                        DisplayController.isTransientTaskbar(mLauncher)
-                                ? mLauncher.getColor(R.color.transient_taskbar_background)
-                                : mLauncher.getColor(R.color.taskbar_background);
-
-                TaskTransitionSpec customTaskAnimationSpec = new TaskTransitionSpec(
-                        taskAnimationBackgroundColor,
-                        Set.of(ITYPE_EXTRA_NAVIGATION_BAR)
-                );
-                WindowManagerGlobal.getWindowManagerService()
-                        .setTaskTransitionSpec(customTaskAnimationSpec);
+                WindowManagerGlobal.getWindowManagerService().setTaskTransitionSpec(
+                        new TaskTransitionSpec(
+                                mLauncher.getColor(R.color.taskbar_background),
+                                Set.of(ITYPE_EXTRA_NAVIGATION_BAR)));
             }
         } catch (RemoteException e) {
             // This shouldn't happen but if it does task animations won't look good until the