Adding some extra logging around draglayer alpha

Bug: 116853349
Change-Id: I8b7ddbfdd74ea422380097e62bea86e160c1651f

src/com/android/launcher3/util/MultiValueAlpha.java

@@ -19,6 +19,8 @@ package com.android.launcher3.util;
 import android.util.Property;
 import android.view.View;
 
+import java.util.Arrays;
+
 /**
  * Utility class to handle separating a single value as a factor of multiple values
  */
@@ -55,6 +57,11 @@ public class MultiValueAlpha {
         }
     }
 
+    @Override
+    public String toString() {
+        return Arrays.toString(mMyProperties);
+    }
+
     public AlphaProperty getProperty(int index) {
         return mMyProperties[index];
     }
@@ -97,5 +104,10 @@ public class MultiValueAlpha {
         public float getValue() {
             return mValue;
         }
+
+        @Override
+        public String toString() {
+            return Float.toString(mValue);
+        }
     }
 }