Improvement to CircularFlow

[rodrigomartind]

Performance improvements in CircularFlow.

Grabacion.de.pantalla.2021-04-04.a.la.s.14.27.22.mov

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[rodrigomartindMeli]

@googlebot I consent

[rodrigomartind]

@jafu888 @camaelon
After that this PR is merged, I will fix the xml in
/home/runner/work/constraintlayout/constraintlayout/projects/MotionLayoutVerification/app/src/main/res/layout/verification_922.xml:253: AAPT: error: '140' is incompatible with attribute circularflow_defaultRadius (attr) dimension.

circularflow_defaultRadius now change to a dimension.

[camaelon]

you have to modify the validation file using CircularFlow, as it still references the value as integer instead of Dp, so the check fails.

MotionLayoutVerification/app/src/main/res/layout/verification_922.xml:253

[rodrigomartindMeli]

you have to modify the validation file using CircularFlow, as it still references the value as integer instead of Dp, so the check fails.

MotionLayoutVerification/app/src/main/res/layout/verification_922.xml:253

Done ✅