celox-common: UMS is deprecated

 * UMS is buggy and deprecated. Disable it.

Change-Id: Ic9fd560088214ace094023c4bf4468f95d5f7ce7
diff --git a/overlay/frameworks/base/core/res/res/xml/storage_list.xml b/overlay/frameworks/base/core/res/res/xml/storage_list.xml
index 8a77ee5..cbda957 100644
--- a/overlay/frameworks/base/core/res/res/xml/storage_list.xml
+++ b/overlay/frameworks/base/core/res/res/xml/storage_list.xml
@@ -38,13 +38,13 @@
              android:storageDescription="@string/storage_internal"
              android:primary="true"
              android:removable="false"
-             android:allowMassStorage="true" />
+             android:allowMassStorage="false" />
 
     <storage android:mountPoint="/storage/sdcard1"
              android:storageDescription="@string/storage_sd_card"
              android:primary="false"
              android:removable="true"
-             android:allowMassStorage="true" />
+             android:allowMassStorage="false" />
 
     <storage android:mountPoint="/storage/usbdisk0"
              android:storageDescription="@string/storage_usb"