Fix launchChrome for chromium on Ubuntu
Fix launchChrome for chromium on Ubuntu

Summary:
On Ubuntu (and maybe other distros), the executable for the chromium browser is 'chromium-browser' instead of 'chromium'.
This commit calls 'chromium-browser' before calling 'chromium' if it exists.

Start an example app on Android with "react-native init project && react-native run-android". Open DevTools: it opens chromium correctly.

[CLI] [BUGFIX] [local-cli/server/utils/launchChrome.js] - Fix launchChrome for chromium on Ubuntu
Closes https://github.com/facebook/react-native/pull/16658

Differential Revision: D6241686

Pulled By: hramos

fbshipit-source-id: 5cd435c3c42c29f0916679298e62e7a323468e37

javache/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,dikaiosune/react-native,exponentjs/react-native,myntra/react-native,jevakallio/react-native,pandiaraj44/react-native,hoangpham95/react-native,arthuralee/react-native,exponent/react-native,hammerandchisel/react-native,jevakallio/react-native,facebook/react-native,jevakallio/react-native,kesha-antonov/react-native,dikaiosune/react-native,exponentjs/react-native,hammerandchisel/react-native,hammerandchisel/react-native,dikaiosune/react-native,hoangpham95/react-native,exponentjs/react-native,pandiaraj44/react-native,hoastoolshop/react-native,pandiaraj44/react-native,ptmt/react-native-macos,javache/react-native,facebook/react-native,exponentjs/react-native,dikaiosune/react-native,myntra/react-native,hammerandchisel/react-native,arthuralee/react-native,hoastoolshop/react-native,exponent/react-native,pandiaraj44/react-native,rickbeerendonk/react-native,hoastoolshop/react-native,rickbeerendonk/react-native,hoastoolshop/react-native,hammerandchisel/react-native,facebook/react-native,hoastoolshop/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,Bhullnatik/react-native,facebook/react-native,ptmt/react-native-macos,facebook/react-native,janicduplessis/react-native,jevakallio/react-native,myntra/react-native,ptmt/react-native-macos,pandiaraj44/react-native,janicduplessis/react-native,janicduplessis/react-native,janicduplessis/react-native,exponent/react-native,myntra/react-native,javache/react-native,exponentjs/react-native,hammerandchisel/react-native,Bhullnatik/react-native,javache/react-native,janicduplessis/react-native,ptmt/react-native-macos,hoangpham95/react-native,exponent/react-native,janicduplessis/react-native,hoangpham95/react-native,pandiaraj44/react-native,ptmt/react-native-macos,hoangpham95/react-native,Bhullnatik/react-native,hammerandchisel/react-native,Bhullnatik/react-native,rickbeerendonk/react-native,jevakallio/react-native,dikaiosune/react-native,hoastoolshop/react-native,rickbeerendonk/react-native,javache/react-native,rickbeerendonk/react-native,facebook/react-native,janicduplessis/react-native,ptmt/react-native-macos,javache/react-native,Bhullnatik/react-native,hoastoolshop/react-native,kesha-antonov/react-native,facebook/react-native,kesha-antonov/react-native,Bhullnatik/react-native,exponent/react-native,exponentjs/react-native,kesha-antonov/react-native,kesha-antonov/react-native,jevakallio/react-native,myntra/react-native,hoangpham95/react-native,dikaiosune/react-native,myntra/react-native,facebook/react-native,jevakallio/react-native,exponent/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,kesha-antonov/react-native,kesha-antonov/react-native,arthuralee/react-native,exponent/react-native,jevakallio/react-native,hoangpham95/react-native,arthuralee/react-native,myntra/react-native,pandiaraj44/react-native,janicduplessis/react-native,hoangpham95/react-native,dikaiosune/react-native,ptmt/react-native-macos,myntra/react-native,exponent/react-native,ptmt/react-native-macos,javache/react-native,facebook/react-native,jevakallio/react-native,Bhullnatik/react-native,exponentjs/react-native,pandiaraj44/react-native,rickbeerendonk/react-native,javache/react-native,myntra/react-native,Bhullnatik/react-native,arthuralee/react-native,dikaiosune/react-native,javache/react-native,exponentjs/react-native,hoastoolshop/react-native