WebdriverIO (the replacement for the deprecated WD driver library) does
not have a method for retrieving a device's pixel ratio. Therefore, this
sets an explicit value for each of our test devices.

Update syntax for WebdriverIO, which is a part of the Appium 2 upgrade.

Seems this method has changed or been removed for Android.

This utility appeared to fail occasionally due to an empty `addButton`
value.

This updates the iOS variant to mirror the structure of the Android
variant in the name of consistency.

Mirror Android implementation found in Appium 2.

Attempt to debug CI failures.

```
FAIL __device-tests__/gutenberg-editor-rendering-media-blocks.test.js (73.496 s)
  ● Gutenberg Editor Rendering Media Blocks test › should be able to render blocks correctly

    unknown method: Not implemented

      at getErrorFromResponseBody (file:/Users/runner/work/gutenberg/gutenberg/node_modules/webdriver/build/utils.js:194:12)
      at NodeJSRequest._request (file:/Users/runner/work/gutenberg/gutenberg/node_modules/webdriver/build/request/index.js:164:23)
      at Browser.wrapCommandFn (file:/Users/runner/work/gutenberg/gutenberg/node_modules/@wdio/utils/build/shim.js:81:29)
```

Avoid the deprecated `touchAction` command.

> The `touchAction` command is deprecated and will be removed in a future version. We recommend to use the action command instead with pointer type touch, e.g.:
>
> await browser.action('pointer', {
>   parameters: { pointerType: 'touch' }
> })

https://webdriver.io/docs/api/element/touchAction/

This may also relate to the fact that Mobile JSON Wire Protocol is
deprecated as well.

> Mobile JSON Wire Protocol
>
> The Mobile JSON Wire Protocol is a super set of mobile commands on top of the JSON Wire Protocol. Given this one is deprecated the Mobile JSON Wire Protocol also got deprecated. Appium might still support some of its commands but it is not recommended to use them.

https://webdriver.io/docs/api/protocols#mobile-json-wire-protocol

This reverts commit 7bb46de.

This prevents `pause` from being called without a parameter, which
throws an error.