Do not clear data for WAPPushManager settings

Turn off user data clear in manifest. The data is used
and filled by carrier and end-user doesn't necessarily know the
consequences of deleting the data.

Bug: 32788589
Test: manual - check that data can't be deleted from Settings app
Change-Id: I5db28f8e127f670a8b0b4ef0d32185bb4bcd7aaf