Fixes the incorrect hover icon color in drop bar when dark theme

Bug: 78641863
Test: Manual test with dark and light wallpapers
Change-Id: Ic3fb68f5c5f746482a7f23b11284e30ac3e10168
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index c866880..c35ab97 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -192,8 +192,10 @@
             mCurrentFilter = new ColorMatrix();
         }
 
-        Themes.setColorScaleOnMatrix(getTextColor(), mSrcFilter);
-        Themes.setColorScaleOnMatrix(targetColor, mDstFilter);
+        int defaultTextColor = mOriginalTextColor.getDefaultColor();
+        Themes.setColorChangeOnMatrix(defaultTextColor, getTextColor(), mSrcFilter);
+        Themes.setColorChangeOnMatrix(defaultTextColor, targetColor, mDstFilter);
+
         ValueAnimator anim1 = ValueAnimator.ofObject(
                 new FloatArrayEvaluator(mCurrentFilter.getArray()),
                 mSrcFilter.getArray(), mDstFilter.getArray());