gta4xl-common: Enable incremental FS feature.

Change-Id: I23e19b4fd6f65d9abeabb50b7b417db966717ccd
diff --git a/vendor.prop b/vendor.prop
index de4dfc9..0521f26 100644
--- a/vendor.prop
+++ b/vendor.prop
@@ -42,6 +42,9 @@
 ro.opengles.version=196610
 ro.surface_flinger.max_frame_buffer_acquired_buffers=3
 
+## Incremental FS
+ro.incremental.enable=true
+
 ## Metadata Encryption
 ro.crypto.dm_default_key.options_format.version=2
 # Call deleteAllKeys if vold detects a factory reset