Change default stateful partition size from 1GB to 1.4GB

A larger stateful is needed for this factory build.

BUG=None
TEST=build image and verify stateful size

Change-Id: I447d30b2bd284afd3da81f3f8b4dcf9d8bf8da45
Reviewed-on: https://gerrit.chromium.org/gerrit/62371
Commit-Queue: Katie Roberts-Hoffman <katierh@chromium.org>
Reviewed-by: Katie Roberts-Hoffman <katierh@chromium.org>
Tested-by: Katie Roberts-Hoffman <katierh@chromium.org>
(cherry picked from commit 9fc886ad7772b2c32fcf77ea3ae0929e6b9e1634)
Reviewed-on: https://gerrit.chromium.org/gerrit/64002
(cherry picked from commit 3a313c6eea00ce00a41a5272c373a1e7c469e147)
Reviewed-on: https://chromium-review.googlesource.com/181200
Tested-by: Jongpil Jung <jongpil19.jung@samsung.com>
Reviewed-by: Jongpil Jung <jongpil19.jung@samsung.com>
Commit-Queue: Jongpil Jung <jongpil19.jung@samsung.com>
diff --git a/build_library/legacy_disk_layout.json b/build_library/legacy_disk_layout.json
index 53db1b3..58c7c28 100644
--- a/build_library/legacy_disk_layout.json
+++ b/build_library/legacy_disk_layout.json
@@ -92,7 +92,7 @@
         "label":"STATE",
         "type":"data",
         "fs_format":"ext4",
-        "blocks":"2097152",
+        "blocks":"2867200",
         "features":["expand"]
       }
     ],