a11y: Update color to use android color system

Screenshot:
 - Before: http://screen/6G8eVJf3QTQeHQd
 - After: http://screen/3g9U2S9iufm7WLs

Bug: 393169987
Test: AutoclickControllerTest
Flag: com.android.server.accessibility.enable_autoclick_indicator
Change-Id: I7c505e2e00dd4721a6d090e332423d335a41edbc
diff --git a/services/accessibility/java/com/android/server/accessibility/autoclick/AutoclickIndicatorView.java b/services/accessibility/java/com/android/server/accessibility/autoclick/AutoclickIndicatorView.java
index 557e1b2..01f359f 100644
--- a/services/accessibility/java/com/android/server/accessibility/autoclick/AutoclickIndicatorView.java
+++ b/services/accessibility/java/com/android/server/accessibility/autoclick/AutoclickIndicatorView.java
@@ -34,6 +34,8 @@
 
 import androidx.annotation.VisibleForTesting;
 
+import com.android.internal.R;
+
 // A visual indicator for the autoclick feature.
 public class AutoclickIndicatorView extends View {
     private static final String TAG = AutoclickIndicatorView.class.getSimpleName();
@@ -67,8 +69,7 @@
         super(context);
 
         mPaint = new Paint();
-        // TODO(b/383901288): update styling once determined by UX.
-        mPaint.setARGB(255, 52, 103, 235);
+        mPaint.setColor(context.getColor(R.color.materialColorPrimary));
         mPaint.setStyle(Paint.Style.STROKE);
         mPaint.setStrokeWidth(10);