Fix bug where non-center page is visibile in HINT_STATE.

Bug: 160122854
Change-Id: I3d970e49aa891f5c9ccda60a6d6f4f73dd0a9f03
(cherry picked from commit e38322294b80aea3eb2c6cfc34818204ceb5e03e)
diff --git a/src/com/android/launcher3/LauncherState.java b/src/com/android/launcher3/LauncherState.java
index c78df62..39b0f2f 100644
--- a/src/com/android/launcher3/LauncherState.java
+++ b/src/com/android/launcher3/LauncherState.java
@@ -250,7 +250,8 @@
     }
 
     public PageAlphaProvider getWorkspacePageAlphaProvider(Launcher launcher) {
-        if (this != NORMAL || !launcher.getDeviceProfile().shouldFadeAdjacentWorkspaceScreens()) {
+        if ((this != NORMAL && this != HINT_STATE)
+                || !launcher.getDeviceProfile().shouldFadeAdjacentWorkspaceScreens()) {
             return DEFAULT_ALPHA_PROVIDER;
         }
         final int centerPage = launcher.getWorkspace().getNextPage();