Remove caret in overview mode

Bug: 30162951
Change-Id: I71f585e4ae6dfba9dc1d18cd00e45d081cabd4b3

src/com/android/launcher3/Workspace.java

@@ -1529,9 +1529,11 @@ public class Workspace extends PagedView
 
     private void setHotseatAlphaAtIndex(float alpha, int index) {
         mHotseatAlpha[index] = alpha;
-        float finalAlpha = mHotseatAlpha[0] * mHotseatAlpha[1] * mHotseatAlpha[2];
+        final float hotseatAlpha = mHotseatAlpha[0] * mHotseatAlpha[1] * mHotseatAlpha[2];
+        final float pageIndicatorAlpha = mHotseatAlpha[0] * mHotseatAlpha[2];
 
-        mLauncher.getHotseat().setAlpha(finalAlpha);
+        mLauncher.getHotseat().setAlpha(hotseatAlpha);
+        mPageIndicator.setAlpha(pageIndicatorAlpha);
     }
 
     public ValueAnimator createHotseatAlphaAnimator(float finalValue) {

src/com/android/launcher3/allapps/AllAppsTransitionController.java

@@ -5,7 +5,6 @@ import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ArgbEvaluator;
 import android.animation.ObjectAnimator;
-import android.graphics.Color;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;

src/com/android/launcher3/pageindicators/CaretDrawable.java

@@ -53,6 +53,10 @@ public class CaretDrawable extends Drawable {
 
     @Override
     public void draw(Canvas canvas) {
+        if (Float.compare(mPaint.getAlpha(), 0f) == 0) {
+            return;
+        }
+
         final float width = getBounds().width();
         final float height = getBounds().height();
         final float left = getBounds().left;
@@ -78,12 +82,13 @@ public class CaretDrawable extends Drawable {
 
     @Override
     public int getOpacity() {
-        return PixelFormat.OPAQUE;
+        return PixelFormat.TRANSLUCENT;
     }
 
     @Override
     public void setAlpha(int alpha) {
-        // no-op
+        mPaint.setAlpha(alpha);
+        invalidateSelf();
     }
 
     @Override