Allow DISABLE_ALL_APPS to be set using a system property.

 - Moving the property to LauncherAppState
 - The property is only read on dogfood builds.

The property can be set using setprop or /data/local.prop

Change-Id: I14c7354efb12edb93f97e81687a6f920cc634e9a
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index 758ee5b..a98d121 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -146,7 +146,7 @@
         Resources res = getResources();
         mMaxCountX = (int) grid.numColumns;
         // Allow scrolling folders when DISABLE_ALL_APPS is true.
-        if (AppsCustomizePagedView.DISABLE_ALL_APPS) {
+        if (LauncherAppState.isDisableAllApps()) {
             mMaxCountY = mMaxNumItems = Integer.MAX_VALUE;
         } else {
             mMaxCountY = (int) grid.numRows;
@@ -1018,7 +1018,7 @@
         int contentAreaHeightSpec = MeasureSpec.makeMeasureSpec(getContentAreaHeight(),
                 MeasureSpec.EXACTLY);
 
-        if (AppsCustomizePagedView.DISABLE_ALL_APPS) {
+        if (LauncherAppState.isDisableAllApps()) {
             // Don't cap the height of the content to allow scrolling.
             mContent.setFixedSize(getContentAreaWidth(), mContent.getDesiredHeight());
         } else {