fix(FEC-8136): quality tracks are filtered by height instead of by label

[yairans]

Description of the Changes

Filtering the quality tracks by label
required for support displaying quality tracks with same height by different label
e.g:

track1: {
    height: 360,
    width: 640,
    bandwidth: 700000,
    label: 'low'
},
track2: {
    height: 360,
    width: 640,
    bandwidth: 800000,
    label: 'high'
}

CheckLists

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• test are passing in local environment
• Travis tests are passing (or test results are not worse than on master branch :))
• Docs have been updated

[OrenMe]

Just change the comment above, it says

in the sorted array has the same resolution as the new

while we now compare the label