Minor fixes to Launcher

- Adding checks to prevent multiple onSetAlpha's to be called (especially now that we are using display lists)
- Removing an old change to keep artificially make the last page wider
- Fixing issue where you could click on an item in the paged view while the page it was on is being faded out

Change-Id: I9b194565602b5200c0688da2caec9c3c829b3bb0

src/com/android/launcher2/BubbleTextView.java

@@ -39,6 +39,7 @@ public class BubbleTextView extends TextView {
 
     private final RectF mRect = new RectF();
     private Paint mPaint;
+    private int mPrevAlpha = -1;
 
     private boolean mBackgroundSizeChanged;
     private Drawable mBackground;
@@ -147,7 +148,11 @@ public class BubbleTextView extends TextView {
 
     @Override
     protected boolean onSetAlpha(int alpha) {
-        mPaint.setAlpha(alpha);
-        return super.onSetAlpha(alpha);
+        if (mPrevAlpha != alpha) {
+            mPrevAlpha = alpha;
+            mPaint.setAlpha(alpha);
+            super.onSetAlpha(alpha);
+        }
+        return true;
     }
 }