Incremental installations in PackageManagerShellCommand.

- onPrepareImage in native,
- allow to check installation type and choose native or managed
dataloaders,
- native data loader for Incremental,
- install-incremental shell command.

Test: atest PackageManagerShellCommandTest
Test: atest IncrementalServiceTest
Bug: b/136132412 b/133435829
Change-Id: I530a8a203fb50132c1869abd0b869036add18699