Move uninstall shim apex logic to InstallUtilsHost

Bug: 160296318
Test: atest StagedInstallTest
Test: atest RollbackManagerHostTest
Change-Id: Id877ccaa5ca0030056a9bd0915a3419c0b18d6a8
Merged-In: Id877ccaa5ca0030056a9bd0915a3419c0b18d6a8
(cherry picked from commit 6e23bc5d0f20f4ff5fcd29234efd7f704ed6a168)
4 files changed