ci: re-enable android 7 saucelabs tests (angular#35171)

We fixed the tunnel connectivity issues by using a localhost domain
alias. Hence we can re-enable the Android 7.1 Saucelabs tests.

PR Close angular#35171

Author: devversion

browser-providers.conf.js

@@ -30,10 +30,7 @@ var CIconfiguration = {
   'Android4.4': {unitTest: {target: 'SL', required: false}, e2e: {target: null, required: true}},
   'Android5': {unitTest: {target: 'SL', required: false}, e2e: {target: null, required: true}},
   'Android6': {unitTest: {target: 'SL', required: true}, e2e: {target: null, required: true}},
-  // Temporary disabled due to SauceLab timeout.
-  // https://angular-team.atlassian.net/browse/FW-1821
-  // 'Android7': {unitTest: {target: 'SL', required: true}, e2e: {target: null, required: true}},
-  'Android7': {unitTest: {target: null, required: false}, e2e: {target: null, required: true}},
+  'Android7': {unitTest: {target: 'SL', required: true}, e2e: {target: null, required: true}},
   'Safari7': {unitTest: {target: 'BS', required: false}, e2e: {target: null, required: true}},
   'Safari8': {unitTest: {target: 'BS', required: false}, e2e: {target: null, required: true}},
   'Safari9': {unitTest: {target: 'BS', required: false}, e2e: {target: null, required: true}},