Migrate to new WM.LP.flags based translucent decor API.

Update/rename common helper class TranslucentDecor to handle both
apis so behavior is correct on old and new builds.

Bug:10674960
Change-Id: Id3b2d523026e9e4f2f71f0eab404792207c6d8c7
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index f2f4962..d330805 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -326,7 +326,7 @@
 
     private BubbleTextView mWaitingForResume;
 
-    protected TransparentBars mTransparentBars;
+    protected TranslucentDecor mTransparentDecor;
 
     private HideFromAccessibilityHelper mHideFromAccessibilityHelper
         = new HideFromAccessibilityHelper();
@@ -426,8 +426,8 @@
         checkForLocaleChange();
         setContentView(R.layout.launcher);
 
-        mTransparentBars = new TransparentBars(findViewById(R.id.launcher));
-        mTransparentBars.requestTransparentBars(true);
+        mTransparentDecor = new TranslucentDecor(findViewById(R.id.launcher));
+        mTransparentDecor.requestTranslucentDecor(true);
 
         setupViews();
         grid.layout(this);