[TextFields] fixing color mapping for floatingNormal and floatingActive Colors.

[mohammadcazig]

Both Floating active and normal color should be set in color scheme.

Before:

After:

[randallli]

I would expect unit tests covering this

[ianegordon]

Please add a before / after screenshot.

[codecov-io]

Codecov Report

Merging #3617 into develop will decrease coverage by <.01%.
The diff coverage is 60%.

@@             Coverage Diff             @@
##           develop    #3617      +/-   ##
===========================================
- Coverage    54.79%   54.78%   -0.01%     
===========================================
  Files          320      320              
  Lines        27303    27305       +2     
===========================================
  Hits         14960    14960              
- Misses       12343    12345       +2

Impacted Files	Coverage Δ
...ds/src/ColorThemer/MDCFilledTextFieldColorThemer.m	0% <0%> (ø)	⬆️
.../src/ColorThemer/MDCOutlinedTextFieldColorThemer.m	0% <0%> (ø)	⬆️
...xtFields/src/ColorThemer/MDCTextFieldColorThemer.m	75.4% <100%> (+0.4%)	⬆️
components/TextFields/src/MDCTextField.m	77.97% <0%> (-1.78%)	⬇️
components/ProgressView/src/MDCProgressView.m	43.19% <0%> (-1.19%)	⬇️
components/Slider/src/MDCSlider.m	78.54% <0%> (-0.34%)	⬇️
components/Chips/src/MDCChipField.m	16.62% <0%> (-0.27%)	⬇️
...onents/TextFields/src/MDCTextInputControllerBase.m	89.6% <0%> (-0.1%)	⬇️
components/private/ThumbTrack/src/MDCThumbTrack.m	60.52% <0%> (+0.39%)	⬆️
...PageControl/src/private/MDCPageControlTrackLayer.m	39.26% <0%> (+1.04%)	⬆️
... and 1 more

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