Restore the getInt / getString call

cf ag/16744674
The getInt will trigger erroprone bug it will be fix soon: b/217722828
Cleaning the temp value we created in the ManagerService while the API
was not yet available
Removing a no-longer user var

Tag: #refactor
Test: build + errorprone
Bug: 217722828
Ignore-AOSP-First: merge conflict resolution
Change-Id: I83077edab761241eb8260d06f8deb10e23e999f8