[Runtime] Enhance AppEnvironment
  - Make BundleEntry.path public
  - Use AppEnvironment in EPlatformContributor for RMI

Follow-up-to: 5401bf81a9e9d321f2775618df75f2d844f215fb
Change-Id: I4b019a63ad993714809ddb10bf042f8f569b9a03
6 files changed