google: Fix issue with stale entries remaining after rename operation

Currently, whenever we perform a rename operation, we set the entry's title to new display name, but at the time of removal of this entry from cache, we still use the newer title. Hence, each time rename is done, a single stale entry remains. This commit fixes the issue by reverting back the title to the original display name of entry and then performing a removal from cache.

Fixes: #410 (closed)