Simplifying some launcher themes

> Replacing some colors with theme attributes
> Simplifying styles definition by removing unnecessary inheritance and inlining some definitions

Change-Id: Ifa167515cae6a7fd3720f1a52ff9ce11abb4495f
diff --git a/src/com/android/launcher3/InfoDropTarget.java b/src/com/android/launcher3/InfoDropTarget.java
index d831a3a..34adf47 100644
--- a/src/com/android/launcher3/InfoDropTarget.java
+++ b/src/com/android/launcher3/InfoDropTarget.java
@@ -25,6 +25,7 @@
 import android.widget.Toast;
 
 import com.android.launcher3.compat.LauncherAppsCompat;
+import com.android.launcher3.util.Themes;
 
 public class InfoDropTarget extends UninstallDropTarget {
 
@@ -42,7 +43,7 @@
     protected void onFinishInflate() {
         super.onFinishInflate();
         // Get the hover color
-        mHoverColor = Utilities.getColorAccent(getContext());
+        mHoverColor = Themes.getColorAccent(getContext());
 
         setDrawable(R.drawable.ic_info_launcher);
     }