[VCN07] Bypass VCN for non-internet app accessible cellular services

Deduce the NET_CAPABILITY_NOT_VCN_MANAGED capability from other
capabilities and user intention, which includes:
   1. For the requests that don't have anything besides
      VCN_SUPPORTED_CAPABILITIES, add the NOT_VCN_MANAGED to
      allow the callers automatically utilize VCN networks
      if available.
   2. For the requests that explicitly add or remove
      NOT_VCN_MANAGED,  do not alter them to allow user fire
      request that suits their need.

Test: atest NetworkRequestTest#testBypassingVcnForNonInternetRequest
Bug: 175662146
Change-Id: I9936894b9530a22fb186cfd25cbee0fced65b72b