[mdc-slider] value updates unexpectedly if using right mouse button

[devversion]

Bug report

Steps to reproduce

1. Go to 'https://material-components.github.io/material-components-web-catalog/#/component/slider
2. Click on the slider with right mouse

Actual behavior

Slider value changes.

Expected behavior

Value does not change. Similarly to native range sliders it's not expected that the right mouse button can be used to drag/change the slider value.

Software	Version(s)
MDC Web	^4.0.0-alpha.0
Browser	Chrome
Operating System	Windows

Related to angular/components#16795

[wagnermaciel]

+1 to this. The same behavior happens with the new mdc slider.