Add storage library (and demo app)
and use for periodic files backup
diff --git a/permissions_com.stevesoltys.seedvault.xml b/permissions_com.stevesoltys.seedvault.xml
index da36b24..62051bc 100644
--- a/permissions_com.stevesoltys.seedvault.xml
+++ b/permissions_com.stevesoltys.seedvault.xml
@@ -5,5 +5,6 @@
<permission name="android.permission.MANAGE_USB"/>
<permission name="android.permission.INSTALL_PACKAGES"/>
<permission name="android.permission.WRITE_SECURE_SETTINGS"/>
+ <permission name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
</privapp-permissions>
</permissions>
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