Don't check for Same-Site cookie on Chrome Android

Chrome on Android has a bug that it doesn't sent cookies with the
same-site attribute for the download manager. To work around that
all same-site cookies get deleted and recreated directly. Awesome!
FIXME: Remove once Chrome 54 is deployed to end-users
@see https://github.com/nextcloud/server/pull/1454

lib/base.php

@@ -520,6 +520,14 @@ class OC {
 			return;
 		}
 
+		// Chrome on Android has a bug that it doesn't sent cookies with the
+		// same-site attribute for the download manager. To work around that
+		// all same-site cookies get deleted and recreated directly. Awesome!
+		// FIXME: Remove once Chrome 54 is deployed to end-users
+		// @see https://github.com/nextcloud/server/pull/1454
+		if($request->isUserAgent([\OC\AppFramework\Http\Request::USER_AGENT_ANDROID_MOBILE_CHROME])) {
+			return;
+		}
 
 		if(count($_COOKIE) > 0) {
 			$requestUri = $request->getScriptName();