fix android e2e script

playground/android/gradle/wrapper/gradle-wrapper.properties

-#Thu Sep 15 09:59:50 IDT 2016
+#Wed Feb 14 14:56:47 IST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

scripts/test.e2e.android.js

 function startEmulator() {
   console.log(`Looking for avd...`);
   const avdsRaw = exec.execSyncRead(`${process.env.ANDROID_HOME}/tools/bin/avdmanager list avd -c`);
-  const avdName = /^.*package\.xml(\S+)$/m.exec(avdsRaw)[1];
+  const avdName = _.get(/^.*package\.xml(\S+)$/m.exec(avdsRaw), '1');
   if (_.isEmpty(avdName)) {
-    throw new Error(`Can't find avd to launch. Please create an avd first.`);
+    throw new Error(`\n\n\nCan't find avd to launch. Please create an avd first.\n\n\n`);
   }
   console.log(`found avd name: ${avdName}, Launching...`);
   exec.execAsyncSilent(`${process.env.ANDROID_HOME}/tools/emulator -gpu host -no-audio @${avdName}`);