Remove redundant loop iteration when getting video bitrate

When calculating a serviceable bitrate, the current logic
looped over the available profiles once without doing any
computation on it. This CL removes the redundant iteration.

Test: n/a
Bug: n/a
Flag: EXEMPT minor test fix with no behavior change
Change-Id: I8b01f05e69bb2017635fce0dbaae8c951e8e03cd