remove proxy binder service IIncrementalManager

This is no longer needed because native Incremental Service directly
uses IDataLoaderManager.

BUG: 150406132
Test: atest service.incremental_test
Test: atest PackageManagerShellCommandIncrementalTest
Change-Id: Idbde2988883becbf3eb707d42c0558774a6073e8
10 files changed