Revert "Do not load xml metadata for unchanged packages in RegisteredServicesCache"

This reverts commit 36de60dc322ba4176947f7509bad19b9c9699b92.

Reason for revert: broke account syncing b/122912184

Change-Id: I32940a4425f9e644843f6acf65b8f67d3629c24b
1 file changed