Move downlink-specific QoS processing into
an if-block.

Uplink policies will not have a user priority
or TCLAS elements.

Bug: 319313500
Test: Manual test
       1. Log all fields in the converted object.
       2. Send an uplink and a downlink policy to
          this method.
       3. Verify that the expected fields are processed
          in each case.
Change-Id: I25a02f80c239c165041226c37ec8e051351e9438
3 files changed