Moving IS_DEBUG_DEVICE to a compile time flag for better proguard support

Bug: 270386012
Test: Presubmit
Change-Id: Ic4a81567f5b9752ab17c725566ce728c3d767bd6
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 67bc7fc..7d01f7b 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -131,10 +131,10 @@
     /**
      * Indicates if the device has a debug build. Should only be used to store additional info or
      * add extra logging and not for changing the app behavior.
+     * @deprecated Use {@link BuildConfig#IS_DEBUG_DEVICE} directly
      */
-    public static final boolean IS_DEBUG_DEVICE =
-            Build.TYPE.toLowerCase(Locale.ROOT).contains("debug") ||
-            Build.TYPE.toLowerCase(Locale.ROOT).equals("eng");
+    @Deprecated
+    public static final boolean IS_DEBUG_DEVICE = BuildConfig.IS_DEBUG_DEVICE;
 
     /**
      * Returns true if theme is dark.