Add headless option to e2e android

scripts/test-e2e.js

 const android = _.includes(process.argv, '--android');
 const release = _.includes(process.argv, '--release');
 const skipBuild = _.includes(process.argv, '--skipBuild');
+const headless = _.includes(process.argv, '--headless');
 
 run();
 
 function run() {
-  const platform = android ? `android` : `ios`;
-  const prefix = android ? `android.emu` : `ios.sim`;
-  const suffix = release ? `release` : `debug`;
-  const configuration = `${prefix}.${suffix}`;
-  const cleanup = process.env.JENKINS_CI ? `--cleanup` : ``;
+    const platform = android ? `android` : `ios`;
+    const prefix = android ? `android.emu` : `ios.sim`;
+    const suffix = release ? `release` : `debug`;
+    const configuration = `${prefix}.${suffix}`;
+    const cleanup = process.env.CI ? `--cleanup` : ``;
+    const headless$ = android ? headless ? `--headless` : `` : ``;
 
-  if (!skipBuild) {
-    exec.execSync(`detox build --configuration ${configuration}`);
-  }
-  exec.execSync(`detox test --configuration ${configuration} --platform ${platform} ${cleanup}`);
+    if (!skipBuild) {
+        exec.execSync(`detox build --configuration ${configuration}`);
+    }
+    exec.execSync(`detox test --configuration ${configuration} --platform ${platform} ${cleanup} ${headless$}`);
 }