Keep only service binding in DataLoaderManager.

This simplifies:
- resource management - no extra copies of controls,
- state management - all states in one place, no more hidden (bound but
not created) state.

Bug: b/153874006
Test: atest PackageManagerShellCommandTest PackageManagerShellCommandIncrementalTest IncrementalServiceTest
Change-Id: I3d16a099c7f42fcf14637c5a8e96bd6f99e073d1
diff --git a/services/incremental/IncrementalService.h b/services/incremental/IncrementalService.h
index 0a18e21..1de0070 100644
--- a/services/incremental/IncrementalService.h
+++ b/services/incremental/IncrementalService.h
@@ -180,6 +180,7 @@
 
         bool isValid() const { return mId != kInvalidStorageId; }
 
+        bool bind();
         bool create();
         bool start();
         bool destroy();