Remove INSTALLER_V2 permission since the API is finalized in S.

Bug: 152310230
Fixes: 152310230
Test: atest PackageManagerShellCommandTest PackageManagerShellCommandIncrementalTest IncrementalServiceTest PackageManagerServiceTest ChecksumsTest
Change-Id: I624eb44a455ba65f156064c57787af5903567d96
7 files changed