Disable Database overwrite upon restore

Launcher overwrites user's favorites table (icons in WorkSpace) upon new
install session from Play Store with install reason being restore. The
overwrite was introduced in the attempt to mitigate failed restore
session due to asynchronous nature of user profile restore, but it has
been causing general instability in backup and restore. Going forward
Launcher should be moving away from table overwrite approach, this will
be implemented in b/148284747.

Bug: 171774227
Test: manual
Change-Id: I91221544dbaeb42224ce9f595906b6d9f0e4aa89