Yarden Eitan 19ef3dd2c2

[ButtonBar] Adds the Ripple behavior to ButtonBar. (#7593) ...

## Related links
* Bug: Closes #7379 
* Ripple: [Ripple](https://github.com/material-components/material-components-ios/tree/develop/components/Ripple)

## Introduction
This PR allows enabling the Ripple Behavior for `MDCButtonBar` by enabling the ripple behavior of the internal `MDCButton`s. This behavior is an opt in flag property added to MDCButtonBar, `enableRippleBehavior`.  This improves the visual touch feedback for our users as MDCInkView didn't support our current motion guidelines. We are also marking any of the Ink APIs ToBeDeprecated as part of the [Deprecation Policy](cb6b8e9599/contributing/deprecation_policy.md (step-4-add-a-comment-to-the-api-indicating-that-it-will-be-deprecated)).

## Videos
| Before | After |
| - | - |
|![oldRipple](https://user-images.githubusercontent.com/4066863/59468585-707e9980-8e00-11e9-8eb4-f6709ea3af94.gif)|![newRipple](https://user-images.githubusercontent.com/4066863/59468588-72e0f380-8e00-11e9-992f-9fecc8383dd7.gif)|

2019-06-15 14:33:13 -04:00

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snapshot

reverting

2019-02-26 11:57:14 -05:00

unit

[ButtonBar] Adds the Ripple behavior to ButtonBar. (#7593)

2019-06-15 14:33:13 -04:00