Fix android 8 by using Android GoogleAPI Emulator

[vweevers]

Same as Android 7:

airtap/lib/sauce-browser.js

Lines 56 to 59 in b9b680d

	// Workaround for https://github.com/airtap/browsers/issues/3
	if (initOpts.browserName === 'android' && initOpts.version.split('.')[0] === '7') {
	initOpts.deviceName = 'Android GoogleAPI Emulator'
	}

I believe this will work because Android GoogleAPI Emulator is listed as a device name for 8 here: https://saucelabs.com/rest/v1/info/platforms/all.

Ref Level/level-js#168 (comment)

[vweevers]

Fix confirmed in https://travis-ci.org/Level/level-js/builds/497411680.