Make GerritApiImpl class public

This allows us to bind this class in our custom Guice stack at
Google.

Change-Id: I2307538a30e80f388346455ff17ef3710bc9ce8c
Signed-off-by: Edwin Kempin <ekempin@google.com>
diff --git a/java/com/google/gerrit/server/api/GerritApiImpl.java b/java/com/google/gerrit/server/api/GerritApiImpl.java
index 6a6415e..24fad34 100644
--- a/java/com/google/gerrit/server/api/GerritApiImpl.java
+++ b/java/com/google/gerrit/server/api/GerritApiImpl.java
@@ -25,7 +25,7 @@
 import com.google.inject.Singleton;
 
 @Singleton
-class GerritApiImpl implements GerritApi {
+public class GerritApiImpl implements GerritApi {
   private final Accounts accounts;
   private final Changes changes;
   private final Config config;