Revert "Add shadow to assistant handles"

This reverts commit c445bbf3eb.

Reason for revert: Causes memory issues on the GPU (~50mb -> ~70mb)

Test: Memory usage goes back down to 53mb with this revert.
https://sponge.corp.google.com/invocation?tab=Logfile+Index&id=7643bf50-41bb-45a7-8c93-d0ddb1f82a04&searchFor=
(last file, search for com.android.systemui#anon-and-swap-avg-median)

Bug: 141187457

Change-Id: Ia48eca3f95097562771abc3a523bd32b74f2d443

packages/SystemUI/src/com/android/systemui/CornerHandleView.java

@@ -19,7 +19,6 @@ package com.android.systemui;
 import android.animation.ArgbEvaluator;
 import android.content.Context;
 import android.graphics.Canvas;
-import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.RectF;
@@ -28,7 +27,6 @@ import android.util.DisplayMetrics;
 import android.view.ContextThemeWrapper;
 import android.view.View;
 
-import com.android.internal.graphics.ColorUtils;
 import com.android.settingslib.Utils;
 
 /**
@@ -109,7 +107,6 @@ public class CornerHandleView extends View {
         mPaint.setColor((int) ArgbEvaluator.getInstance().evaluate(darkIntensity,
                 mLightColor,
                 mDarkColor));
-        updateShadow();
         if (getVisibility() == VISIBLE) {
             invalidate();
         }
@@ -121,21 +118,6 @@ public class CornerHandleView extends View {
         canvas.drawPath(mPath, mPaint);
     }
 
-    private void updateShadow() {
-        if (ColorUtils.calculateLuminance(mPaint.getColor()) > 0.7f) {
-            mPaint.setShadowLayer(/** radius */ 5,/** shadowDx */ 0, /** shadowDy */ -1,
-                    /** color */ ColorUtils.setAlphaComponent(/** color */ Color.BLACK,
-                                                              /** alpha */ 102));
-        } else {
-            mPaint.setShadowLayer(/** radius */ 0, /** shadowDx */ 0, /** shadowDy */ 0,
-                    /** color */ Color.TRANSPARENT);
-        }
-
-        if (getVisibility() == VISIBLE) {
-            invalidate();
-        }
-    }
-
     private static float convertDpToPixel(float dp, Context context) {
         return dp * ((float) context.getResources().getDisplayMetrics().densityDpi
                 / DisplayMetrics.DENSITY_DEFAULT);